Breaking the Limits: Explore the Pinnacle of Connectivity with the Best IoT SIM Cards

Which is the Best IoT SIM card?

In a world where connectivity is king, the Internet of Things (IoT) has emerged as a game-changer, seamlessly integrating devices and systems to enhance efficiency and convenience. At the heart of this digital revolution lies the unsung hero – the IoT SIM card. Join us as we embark on a journey to break the limits and explore the pinnacle of connectivity with the best IoT SIM cards of 2024.

Unveiling the Powerhouse of Connectivity

Picture this: a world where your devices communicate effortlessly, data flows seamlessly, and connectivity is not just a luxury but a necessity. This is the promise of IoT, and at its core is the choice of the correct SIM card. The best IoT SIM card is the lifeline, connecting your devices to the digital realm with unparalleled efficiency.

The Search for Excellence

With the ever-growing market of IoT SIM cards, the search for the best can be daunting. Fear not, for we’ve delved deep into the digital landscape to uncover the true champions. These SIM cards go beyond the ordinary, breaking the limits to redefine connectivity standards.

1. Unparalleled Speed and Reliability

The IoT SIM cards are not just cards but powerhouses of speed and reliability. Imagine your devices communicating at lightning speed, transmitting data without a hiccup. These SIM cards ensure a smooth and uninterrupted flow of information, making them the backbone of any IoT project.

2. Global Connectivity at Your Fingertips

No more boundaries – that’s the promise of the best IoT SIM cards. With global coverage, these cards empower your devices to join from almost anywhere on the planet. Whether your IoT project spans cities, countries, or continents, these SIM cards ensure your devices stay connected, breaking geographical barriers effortlessly.

3. Robust Security Measures

The IoT SIM cards offer robust security measures in a world increasingly concerned about data security. Your data is not just transmitted; it’s shielded by layers of encryption, ensuring confidentiality and integrity. These SIM cards provide peace of mind, knowing your IoT ecosystem can withstand potential threats.

4. Seamless Integration with IoT Ecosystems

Connectivity is not just about speed; it’s about how seamlessly your devices integrate into the larger IoT ecosystem. The IoT SIM cards aim to play well with various devices and platforms, ensuring a hassle-free integration process. Whether working with smart home devices or industrial sensors, these SIM cards are your key to a cohesive IoT network.

 5. Cost-Effective Efficiency

The IoT SIM cards excel in speed and reliability and bring cost-effective efficiency to the forefront. These cards optimize data usage, ensuring high performance without breaking the bank. Whether managing a large-scale IoT network or a smaller project, experience top-tier connectivity without compromising your budget – a defining feature of the best IoT SIM cards in 2024.

Choosing the Best IoT SIM Card for Your Project

Now that we’ve explored the features that make the IoT SIM cards stand out, how do you choose the right one for your project? It all boils down to understanding your needs and considering data requirements, geographical coverage, and security protocols.

As you embark on your quest for the best IoT SIM card, remember – it’s not just a card; it’s your gateway to the pinnacle of connectivity. Break the limits, redefine possibilities, and let your IoT devices thrive in a world where seamless connectivity is not just a choice but a necessity.

In conclusion, the best IoT SIM cards are more than just tools; they are enablers of a connected future. Explore, experiment, and elevate your IoT experience with the powerhouses of connectivity that await you in 2024. The digital realm is calling – are you ready to answer with the best IoT SIM card at your disposal?

eSIMs or Removable SIMs for IoT, Which Is Best?

Image of different IoT SIM card form factors and the dates they were released including eSIM
Plastic SIMs and eSIM (MFF2)


Clients often ask “Which should I use, traditional plastic SIMs, or embedded SIMs  (eSIMs) for my IoT solution?” Our go-to answer is always, “It depends.” We answer this way because it really does depend on many factors.

In this article we explore the pros and cons of both eSIMs physical SIMs for IoT projects. Not all pros and cons will have equal weight for each solution developer, but we think this is a good primer on the differences of each type of IoT SIM card.

First, let’s quickly define what we are talking about. We wrote an article several years ago that spoke to the evolution of the IoT SIM card specifically relating to the evolution of the technology behind SIM cards. We talked about eUICC as an emerging tech, and we called this an “eSIM.” For the purposes of this article, we are calling the embedded SIM (MFF2 form factor) an eSIM. Physical SIM cards are typically 2FF, 3FF, or 4FF form factors, but can also be enabled with eUICC tech, making them also “eSIMs.”  “eSIM” refer to either a SIM with eUICC technology, or an embedded SIM, but these are very different things.

Embedded SIM (eSIM):

eSIM Pros:

  1. Remote Provisioning: eSIMs are provisioned remotely and programmed with the necessary network credentials using bootstrap profiles. This eliminates the need for physical access to the device, and is particularly useful for IoT devices in remote or hard-to-reach locations.
  2. Scalability: eSIMs make it easier to scale your IoT deployment because you can provision and manage a large number of devices without physically swapping SIM cards.
  3. Reduced Physical Footprint: eSIMs are integrated into the device’s hardware, saving space and allowing for more compact IoT device designs.
  4. Improved Security: eSIMs often offer enhanced security features, such as better resistance to physical tampering and improved authentication protocols.
  5. Flexibility: eSIMs can switch between different carrier profiles, providing flexibility and cost optimization as you can select the best network for a given location or situation. However, this requires the cooperation of both carriers which is not always a given. Many carriers will not allow these profile change-overs.

eSIM Cons:

  1. Initial Cost: Implementing eSIM technology may require upfront investments in hardware and infrastructure for remote provisioning and management. Even the MFF2 SIM is more costly than traditional plastic SIMs.
  2. Compatibility: Not all IoT devices are eSIM-ready, so retrofitting existing devices with eSIM capabilities can be challenging and costly.
  3. Dependency on Manufacturers: Device manufacturers must support eSIM technology for it to be effective, and not all manufacturers do, limiting device options.

Traditional Physical SIM Cards:

Physical SIM Pros:

  1. Widespread Compatibility: Traditional SIM cards are widely supported by most IoT devices and have been the standard for many years.
  2. Low Initial Cost: The cost of traditional SIM cards and card readers is generally lower than implementing eSIM technology.
  3. Interchangeability: Physical SIM cards can be easily swapped between devices, which can be useful in some situations.

Physical SIM Cons:

  1. Physical Access Required: Changing SIM cards typically requires physical access to the device, which can be impractical for remote or deployed IoT devices.
  2. Scalability Challenges: Managing a large number of physical SIM cards can be cumbersome, leading to logistical challenges as your IoT deployment scales.
  3. Security Concerns: Traditional SIM cards are more susceptible to physical tampering and unauthorized removal, potentially compromising security.
  4. Limited Network Flexibility: Switching between carriers or network profiles is more difficult with physical SIM cards, leading to potential coverage and cost inefficiencies.

The choice between eSIM technology and traditional physical SIM cards in IoT applications depends on your specific use case and requirements. eSIMs offer advantages in terms of remote management, scalability, and flexibility. Traditional SIM cards are more widely compatible and have lower initial costs. It’s essential to evaluate your project’s needs, device compatibility, and long-term scalability when making this decision.

If you would like to have a conversation with one of our experts, please fill out our contact form. The contact form is located here. One of our experts will be in touch within 1 business day.

The Use M2M SIM Cards in GPS Applications

GPS Points on a map of the world
GPS Points on a map of the world connected with M2M SIM Cards


In the rapidly evolving landscape of technology, the Internet of Things (IoT) has emerged as a transformative force, connecting countless devices to the internet, enabling data exchange, and revolutionizing various industries. Among the groundbreaking applications of IoT, the use of M2M SIM cards in GPS (Global Positioning System) technology stands out as a game-changer. You might only think of GPS applications as tracking vehicle, but there are so many more solutions using GPS. This fusion of connectivity and GPS has opened up new frontiers in tracking, navigation, and location-based services, offering unprecedented opportunities for businesses and consumers alike.

Understanding M2M SIM Cards

Traditional SIM cards have long been used in mobile phones to connect to cellular networks. However, M2M SIM cards (AKA IoT SIM cards) are specifically designed to cater to the unique requirements of connected devices that fall under the purview of the Internet of Things. These SIM cards offer features like lower power consumption, enhanced security, and the ability to manage data usage efficiently.

Seamless Connectivity for GPS Devices

GPS devices, whether they are in vehicles, wearable gadgets, asset trackers, or environmental sensors, need reliable and continuous connectivity to function effectively. M2M SIM cards provide seamless connectivity across multiple networks, ensuring uninterrupted GPS data transmission. By leveraging these M2M SIM cards, GPS applications can operate without limitations, even in remote or challenging environments.

Real-Time Tracking and Fleet Management

IoT-powered GPS devices enable real-time tracking of vehicles, assets, and personnel. Fleet management becomes more efficient and productive, as businesses can monitor their vehicles’ locations, routes, and driving behavior in real time. This data-driven approach enhances safety, optimizes routes, reduces fuel consumption, and increases overall operational efficiency.

Precision and Accuracy

The integration of SIM cards with GPS applications enhances location accuracy significantly. IoT SIM cards ensure that the GPS devices remain connected to the strongest available network, reducing potential disruptions and enhancing precision. For industries such as agriculture and logistics, where precise location data is critical, this level of accuracy proves to be invaluable.

Geo-Fencing and Location-Based Services

Geo-fencing, a popular feature in GPS applications, allows users to set virtual boundaries around a specific location. When a GPS-equipped device enters or exits these predefined areas, it triggers automated actions or notifications. IoT SIM cards facilitate instant communication between the device and the backend systems, ensuring quick response times and seamless execution of location-based services.

Cost-Effective Data Management

IoT SIM cards offer flexible data plans tailored to the unique data requirements of various GPS devices. This flexibility allows businesses to manage data consumption efficiently, reducing unnecessary costs. Whether it’s occasional location updates or continuous real-time tracking, SIM cards provide cost-effective solutions to suit diverse GPS applications.

Environmental Monitoring and Smart Cities

IoT-enabled GPS devices play a crucial role in environmental monitoring, allowing researchers and authorities to gather data on air quality, weather patterns, and other environmental factors. Additionally, in the context of smart cities, M2M SIM cards are instrumental in supporting connected infrastructure and optimizing urban services like traffic management and waste collection.

Enhanced Security and Anti-Theft Measures

IoT SIM cards offer robust security features, safeguarding the data transmitted between the GPS devices and the backend servers. In case of theft or unauthorized access, these SIM cards enable remote device lock-down or data wipeout, mitigating potential risks and ensuring the protection of sensitive information.

Emergency Response and Personal Safety

GPS applications utilizing IoT SIM cards have proven to be life-saving tools in emergency situations. From locating lost or injured hikers to enabling rapid response during disasters, IoT-powered GPS devices provide critical location information to emergency services, expediting rescue operations and improving personal safety.

Scalability and Future Potential

As the IoT ecosystem expands, the application of SIM cards in GPS technology will continue to evolve. With the growth of 5G networks and advancements in satellite technology, the scope for GPS applications will expand, leading to more sophisticated and innovative use cases in domains such as autonomous vehicles, precision agriculture, and augmented reality.


The integration of M2M SIM cards with GPS applications has ushered in a new era of connectivity, precision, and efficiency.  GPS devices can now offer real-time tracking, enhanced security, and cost-effective data management. This is achieved using SIM Card connectivity. This seamless connectivity ensures that GPS applications can thrive in diverse environments. It unlocks a wealth of opportunities across industries, from fleet management and logistics to environmental monitoring and emergency response. As technology continues to advance, the synergy between cellular connectivity and GPS applications will undoubtedly lead to even more innovative solutions and transformative changes in the way we navigate and interact with the world around us.

If you would like to learn more about IoT SIM cards in GPS Applications, please reach out to us. You can request information by filling out our Contact Form. OneSimCard has been working with thousands of GPS application providers and we will be happy to share what we have learned in our over 27 years in Telecoms.

What Shakespeare says about OneSimCard’s IoT SIM Card


Oh, fair audience, lend me your ears, for I shall speak of OneSimCard IoT and its wondrous IoT SIM card. In this age of technological marvels, where devices converge and speak in unison, OneSimCard IoT doth shine bright as a beacon of connectivity and enlightenment.

Behold, the IoT SIM cards, the conduits of digital communication, through which devices may interconnect and exchange information. Like tiny messengers traversing a vast electronic realm, they carry data with unparalleled speed and precision.

With OneSimCard IoT SIM cards, the world of the internet of things unfolds before our very eyes. Devices, once mere inanimate objects, awaken to a symphony of interwoven data. Machines, sensors, and contrivances speak in a language of their own, sharing knowledge and insight without the need for human intervention.

Imagine, dear friends, the possibilities that these IoT SIM cards unfold. In factories, they monitor the rhythm of production, ensuring efficiency and quality. In cities, they orchestrate the symphony of traffic and energy, harmonizing the flow of life. And in homes, they bring forth a realm of smart living, where convenience and sustainability intertwine.

But ’tis not just the capabilities of these SIM cards that doth astound, for their reliability is as steadfast as a mountain’s foundation. In the harshest environments, from scorching deserts to icy tundra, these SIM cards endure, connecting devices without falter. They are the steadfast companions in this ever-changing landscape of technology.

And let us not forget the support and guidance that OneSimCard doth provide. Their team of experts, wise as sages, stand ready to assist those embarking on the journey of IoT. With their knowledge and expertise, they illuminate the path, ensuring success and prosperity for all who venture forth.

So, let us embrace this wondrous world of OneSimCard IoT and its IoT SIM cards. Let us marvel at the interconnectivity of devices and the boundless potential that lies before us. For in this realm, the union of art and technology doth flourish, creating a tapestry of innovation and enlightenment.

If you are interested in learning more about OneSimCard IoT and the capabilities of our IoT SIM Card connectivity fill out our contact form and one of our experts will schedule a time for a discussion.

(This is obviously us having fun with AI and not the actual words of Shakespeare!)

Using IoT SIM Cards in Alarm Systems

IoT Sim Cards in Alarms

The Internet of Things (IoT) has revolutionized the way we live, work, and interact with our surroundings. One of the most important applications of IoT technology is in the field of security and safety, where it is used to create smart alarms that can detect and respond to various threats. IoT SIM cards are a key component of these smart alarms, allowing them to communicate with other devices and systems over cellular networks. In this article, we will explore the use of IoT SIM cards for alarms and provide five examples of how they are used.

What are IoT SIM cards?

An IoT SIM card is a special type of SIM card that is designed for use in IoT devices. These devices are typically low-power and low-data-rate, and they require a specialized SIM card that can handle their specific communication needs. IoT SIM cards are designed to work with cellular networks and are capable of communicating with other IoT devices and systems over the internet.

Using IoT SIM cards for alarms

IoT SIM cards are an essential component of smart alarms, which are alarms that are capable of detecting and responding to various threats. These alarms use a variety of sensors, such as motion sensors, temperature sensors, and smoke detectors, to monitor the environment and detect potential threats. When a threat is detected, the alarm sends a notification to the user or a central monitoring system, which can then take appropriate action. Here are five examples of how IoT SIM cards are used in smart alarms:

  1. Home security systems

SIM cards are commonly used in home security systems, which are designed to protect homes and families from burglary and other threats. These systems typically include a variety of sensors, such as door and window sensors, motion sensors, and cameras, that monitor the home and detect potential threats. When a threat is detected, the system sends a notification to the user or a central monitoring system over the cellular network.

  1. Fire alarms

SIM cards are also used in fire alarms, which are designed to detect and respond to fires. These alarms use a variety of sensors, such as smoke detectors and heat detectors, to monitor the environment and detect potential fires. When a fire is detected, the alarm sends a notification to the user or a central monitoring system over the cellular network.

  1. Flood alarms

Flood alarms are another example of smart alarms that use SIM cards. These alarms use sensors to detect water levels and other indicators of flooding, such as humidity and temperature. When a flood is detected, the alarm sends a notification to the user or a central monitoring system over the cellular network.

  1. Industrial alarms

SIM cards are also used in industrial alarms, which are designed to detect and respond to various threats in industrial settings. These alarms use a variety of sensors, such as pressure sensors and temperature sensors, to monitor industrial equipment and detect potential problems. When a problem is detected, the alarm sends a notification to the user or a central monitoring system over the cellular network.

  1. Medical alarms

SIM cards are also used in medical alarms, which are designed to monitor patients and detect potential medical emergencies. These alarms use a variety of sensors, such as heart rate monitors and blood pressure monitors, to monitor the patient’s vital signs and detect potential problems. When a problem is detected, the alarm sends a notification to the user or a central monitoring system over the cellular network.


IoT SIM cards are a key component of smart alarms, which are alarms that are capable of detecting and responding to various threats. These alarms use a variety of sensors to monitor the environment and detect potential threats, and they use IoT SIM cards to communicate with other devices and systems over cellular networks. IoT SIM cards are used in a variety of applications, including home security systems, fire alarms, flood alarms, industrial alarms, and medical alarms.

OneSimCard IoT is a global leader in IoT SIM Card Connectivity for deployments around the world. A division of Belmont Telecom, Inc., OneSimCard IoT helps customers in the remote alarm industry and many other industries connect their “things” using IoT SIM cards. Our IoT SIM cards are used internationally by companies of all sizes. If you are interested in learning more, please contact us by filling out our Contact Form.

IoT SIM Card Deployments in Global AgTech: A Case Study

IoT Sim cardfor AgTech
AgTech IoT SIM card Connectivity


As Agricultural Technology grows (pun intended) in popularity around the world, connecting all of these “things” is increasingly more difficult. International implementations face many obstacles. We focus on the issues with IoT SIM card use in worldwide operations. Some of the same complications occur in single country use as well. Streamlining these deployments saves time, money & headaches. This article focuses on one such case.  We will discuss a soil moisture sensor company struggling with their multi-national deployments. We will cover their solution, their initial problem, the steps they took to remedy the situation, and the solution they chose.

The Customer’s Description

As a Start-Up, this company needed to grow fast and were sending their moisture sensors all over the world, and they had pilots currently running in 27 different countries. Their solution includes a mesh network of wireless sensors spread over the fields of a grower and all of the data aggregated in a gateway device that sends all of the data back to a server for analysis and reporting on their UI. The gateway device is a standard rugged router. It uses a 3FF global IoT SIM card powering the connection to the back end through cellular networks. The gateway required bi-directional proactive communication because they needed to reach the gateway from time to time on demand.  Their sensors test the soil every 3 hours. The total amount of data per gateway averages 72MB per month.

The Problem

They struggled with how they would put together a solution for all of these disparate countries, though. It takes time and resources to find an IoT SIM card provider in each country. Using these various providers further complicates matters because they had to manage multiple SIM management portals, multiple APNs, SKUs for each IoT SIM card provider, and several languages to deal with (English, French, Spanish, Portuguese, Russian, Chinese, and German to name a few).

All of this takes time and resources. As a small company, their time really does mean money, because navigating all of the vendors, and programming their routers based on where the devices were being sent took time away from marketing and selling their solution. They estimated it took 47% of their time finding local cellular providers. Also setting up the new vendors’ APN’s and SKUs into their workflow, learning a new portal for SIM card management, etc., etc. That is all time when they could be building a strong sales funnel, meeting with new prospects, working on marketing  efforts, and so forth.  They estimated if they could focus 47% more time on these tasks, their annual revenue would grow over $1M.

What They Tried

Over the last 6 months they tried to standardize their connectivity providers to a smaller number. They thought this would solve the issues. What they discovered was that it did help, but the benefits were not sufficient. The CTO and COO still had to think about how devices needed to be configured for each country. They also had to manage multiple platforms which takes time to learn and implement different portals and the API’s each portal used (if they supported API’s). They also had different IP ranges to deal with, where a single IP range would be easier to manage because they could used a single VPN with a single IP range.

The OneSimCard IoT Sim Card Solution

OneSimCard IoT logoWe came to the table with our ears open. We heard their problems and developed a solution tailored to their particular needs. What we came up with was a single, Multi-IMSI, eUICC enabled  Global IoT SIM card. Our IoT SIM card  is used virtually anywhere in the world with a single APN. OneSimCard IoT covers 200+ countries and territories.  A single APN means they are able to set-up all of their devices the same, regardless of the device’s destination.

We also provided the client a single private static IP range large enough to support all of their IoT SIM card deployments for the foreseeable future. We recommended an OpenVPN solution for their bidirectional proactive communication to their cellular gateways. Because it only allows one concurrent user, OpenVPN is a low cost alternative to our IPSec VPN solution. It provides the communication this client needed, though.

The client also benefited from the use of our OSCAR SIM management Portal.  OSCAR is built in-house from the ground up. When a customer wants to make a change, we make that change quickly. This flexibility helps our clients by catering to their specific requirements without over-complicating the experience. OneSimCard IoT’s portal is cloud based and has mobile apps available on Google Play as well as Apple’s App Store. We also provide a full set of API’s to our Portal. This allowed the client to tie their portal to ours with only one set of API’s.

The Result

The benefit was immediate. Streamlining to a single provider gave the client back their valuable time. They now can concentrate more time and resources on revenue producing activities. In the first month since the change to OneSimCard IoT, they were able to implement 20% more solutions. They also were able to add 25% more new opportunities into their sales funnel. If 5% of these prospects close, this adds $1.5M in annual revenue.

If you have an AgTech solution, or any other IoT solution that needs connectivity, contact us. Our IoT experts will be happy to listen to your requirements and develop a solution just for you. The best way to reach is is by email You can also fill out our contact form, and we will be in touch!

Why IP Filtering Is Important for Security

When you put together an IoT solution the intention is always to route data traffic to where you want, but this isn’t always ensured. Devices and IoT SIM cards aren’t inherently secured and we have written numerous articles on ways to lock your IoT solution down. Today we want to discuss the best way to ensure that data can only go where you expect using IP Filtering on your IoT SIM card.

IP Filtering (or IP Whitelisting) is a method whereby you identify only those IP addresses where data can travel. This is critical because IoT SIM cards and devices tend to be open to send data anywhere and without filtering at the IoT SIM card level, devices can be hacked to send data to other IP addresses other than where you want the traffic to go. 

OneSimCard has the ability to filter the IP addresses where our IoT SIM cards are able to send data. This is accomplished by whitelisting the IP addresses where you want data traffic to end up. Our clients send us these trusted IP addresses and we set these rules up in our Network server to only allow he IoT SIM cards to send traffic to these addresses. If the IoT device attempts to send traffic to any other address, it will fail because we have blocked that IP address by rule.

Use cases for IP Filtering are numerous. Here are just a few examples:

  • IoT SIMs in Hotspots for employees to limit the IP addresses where the employee can navigate using the company asset (not exactly IoT, but the SIM doesn’t know that!);
  • SIMs in ATM’s and credit card processing where banking information is transmitted and must be secure and data traffic must be limited;
  • Alarms and security products like cameras because, especially with cameras, only you want to have this data, and leakage to other IP addresses can be expensive;
  • Any IoT solution which counts on very small data quantities because data leakage can lead to overage and higher costs.

If you would like to learn more about our IP Filtering solution for IoT SIM cards and if this is something that makes sense for your organization, please reach out to and one of our IOT experts will be glad to talk this through with you.

Securing Your IoT Deployment by Replacing Public Static IP’s

Securing Your IoT Deployment
Securing Your IoT Deployment

Security is on top of mind for every stakeholder of IoT device deployments and discussions of the best way to secure data is ongoing and constantly evolving. We are regularly consulted on how to harden IoT device data specifically related to IoT SIM cards and data transfer. The goal of this article is to share best practices we have learned over the many years we have been dealing with this question particularly related to the risk of Public Static IP’s and how to mitigate this risk.

Most devices that are deployed with IoT SIM cards deliver data unidirectionally by sending data from the device to your server based on time interval or event triggers and no reply/response is required from the server back to the device, or bidirectionally sending data to and receiving data from the IoT device. This bidirectional communication is where we will concentrate.

Bidirectional data transfer without using Static IPs is typically accomplished using 2 distinct methods:

  1. Polling – this is accomplished by the IoT device initiating communication with your server using protocols like HTTP to request information from the server. Your server can then capture the IP address of the IoT SIM and send its response back to the device using this now known dynamic IP address. This works well for cases when the IoT device is able to initiate communication, or “poll,” typically based on time intervals or if a certain event triggers this communication.
  2. Socket based – where the device maintains an open connection with your server using protocols such as MQTT. The persistent, open connection allows both the IoT device and your server to communicate with each other independently from one another. Unlike polling, neither the device nor the server relies on the other to initiate communication.

While these examples of bidirectional communication are viable, they do have significant drawbacks:

  • Polling relies on the IoT device to initiate communication with the server and this, as previously mentioned, is based on time or event triggers which don’t allow for you to connect with the IoT device whenever you want; you have to wait for the device to initiate and this could be too long of a period of time.
  • Socket based communication relies on the persistent connection which for a number of reasons could get interrupted. If the connection is interrupted, then you must wait for the device to open another connection because the dynamic IP address of the IoT SIM card could have changed and there is no way of knowing the new IP address for the IoT SIM card.
  • Not all devices support these types of communication protocols and this limits your choices when choosing IoT devices for your project.

Because of these considerable drawbacks, enterprises use Static IPs on IoT SIM cards for much more reliable bidirectional communication. Static IPs allow you to communicate with the IoT device at any time because, by definition, you always know the IP address of the SIM card. There are two types of Static IPs, Public and Private. We are going to talk about replacing Public Static IPs with Private Static IPs because of the security and cost concerns with Public Static IPs.

First, it is important to understand a bit more about Public Static IPs.


Public Static IPs

IoT SIM cards with Public Static IPs have been used for IoT deployments for bidirectional communication between IoT devices and servers for many years. These static IPs allow you to proactively reach out to a remote IoT device in the field at any time using the known IP address. Because these are Public IP addresses, you can communicate with your devices from any machine which, on first blush, seems like a handy solution. This access raises an enormous security concern though. By definition, these IPs are addressable to any machine on the public internet, which forces organizations to implement ancillary security methods like rotating passwords, whitelisting incoming connections and turning off services which aren’t being used. This security concern also extends to the server to which the IoT device connects, because that server also needs to be publicly available. Here is a diagram of this design:

Public Static IPs
Security Flaws of Public Static IPs

As you can see, this design is inherently flawed from a security standpoint because the use of publicly accessible IPs exposes your deployment to intrusion by hackers from anywhere in the world.

Security isn’t the only concern when using IoT SIM cards with Public IPs, though. Cost is another consideration. Just like Real Estate, there is a finite number of Public IPs available. This drives the cost of Public Static IPs higher and it takes time to deploy these Public IPs from the network carriers. Cost and time are major hindrances to effective IoT device deployment.


IoT SIM cards with Private Static IPs – The Solution to Replace Public Static IPs

The other method to bidirectional communication is to deploy Private Static IPs on your IoT SIM cards. Just like Public Static IPs, Private Static IPs allow you to always know the address of your device and access the device at any time. However, IoT Sim cards with Private Static IPs do not allow public access to the IoT device because only devices or servers on the private network are allowed to communicate with the devices within the network. It is possible, if necessary, to send data from the IoT device to a place on the public internet (external site) but proactive communication to the IoT SIM card can only be initiated from within the private network. We create this private network in 2 ways.

  1. Peer to Peer communication. This method uses an IoT SIM card with Private Static IP in your IoT device and another IoT SIM card either in a router behind your firewall, or in another IoT device if the devices need to communicate with each other. Peer to Peer communication is typically used when small amounts of data is being used because you are essentially doubling your cellular data consumption because the IoT SIM card on your server is acting as the data connection rather than traditional ISPs. This can be expensive if large amounts of data are being transferred, and;
  2. VPN connection. VPN (IPsec or OpenVPN) is a much more common method to create the connection to the IoT SIM card with Private Static IP. The way this works is a VPN connection is made from your server to our server which, by rule, is connected to all of our IoT SIM cards. This tunnel communicates securely to your IoT devices because the traffic is encrypted end to end and all traffic is kept within this secure tunnel. This is by far the most secure and cost-effective way to maintain bidirectional communication with your IoT devices.

Below are diagrams demonstrating Peer to Peer and VPN connections with Private Static IPs:

Peer to Peer Connection:

Peer to Peer Connection

VPN Connection with Private Static IPs:

VPN Connection with Private Static IPs

Clearly, using Private Static IPs on IoT SIM cards is a much more elegant and secure way to communicate. This setup will allow reliable, cost-effective bidirectional communication between your servers and your IoT devices and it reduces the need for further hardening which is required when using Public Static IPs.

If you would like to speak with one of our IoT experts, please reach out to us anytime at

Why Flexible Data Plans Are Critical for IoT Deployments

Not All IoT SIM Card Deployments Are Equal. Why Treat Them as Such?

Flexible Data Plans
Using Flexible Data Plans

Every day we are reminded that there is no “average” IoT project because of the many unique requests we receive for our connectivity solutions. There are as many different projects as anyone can dream of, literally, and each project has its own idiosyncrasies, and therefore have distinctive requirements from their IoT SIM card connectivity provider. These requirements and need for flexibility/customization is most often seen in the data plan consumption model(s) for the project. 

There are several ways that data plans can be customized/flexible. They include:

  • Pooled versus Pay-As-You-Go (PAYG) plan models
  • One-time payment/use (think disposable SIMs)
  • Prepaid versus Postpaid
  • Unusually sized data plans
  • Plans for testing at manufacturer before full activation
  • Limiting the countries in which the IoT SIM can operate
  • Limiting the amount of Data an IoT SIM can consume
  • Many other customizations

For the purposes of this article, we will concentrate on the first of this list, Pooled Vs. PAYG plan models.

Years ago, all plans were essentially PAYG. Each SIM card had their own plan and consumed its own data, or they were simply charged be MB for the data they used. These plans are almost always Prepaid. Then Pooled data was introduced where all of the SIMs on an account share a “pool” of data. This type of plan is designed for a scenario where there are some SIM cards that use more data and others use less data. So long as the overall data consumption on the account doesn’t exceed the amount of the data pool, then there are no “overage” charges and costs are very consistent and predictable. So which plan is the “right” plan for your project? To answer this question, let’s look at the pro’s and con’s of each plan type, and some typical use cases for each type of plan.  

PAYG plans are excellent for projects where each SIM card will use much different amounts of data, and/or have different use cases (could be multiple projects on a single account). This offers a lot of flexibility because each SIM can have a different plan, or no plan at all and simply pay a per MB rate. Another plus to each SIM card having its own plan is in global deployments where there are some countries where the rates are dramatically higher than other countries. Having the flexibility to assign each SIM a separate plan means you are able to get the best price for the SIMs in countries with low rates and not be “forced” into paying a higher tariff based on the more expensive countries where SIMs are needed. 

PAYG plans are typically used in low data consumption projects like Asset Tracking, where the device may only report a GPS location every few hours, or not at all if they aren’t deployed, or in the middle of the ocean. There could be other SIMs on these types of accounts that are reporting more often and maybe reporting more information like temperature, humidity, etc. which drive up data consumption. These IoT SIM cards will need other plans to take into account the different data usage.

Another solution type that may benefit from PAYG data plans is Vehicle Tracking/Telematics. The reason why this type of solution benefits from PAYG plans is there are sometimes vast differences in the amount of data needed between devices, depending on the use of the vehicles being tracked and the type of data being collected from the vehicles. We say “may benefit” because there are a lot of cases where the data is fairly static and PAYG may not be the right plan type.

The cons of a PAYG plan are that the plans tend to be more “cookie-cutter” like 5, 10, 25, 50, 100, etc. MB plans and the plans tend to be more expensive than Pooled data plans, especially on the lower data consumption plans; the effective per MB cost is higher than Pooled plans of similar sizes. PAYG plans also usually have “monthly minimum revenue requirements” where all active IoT SIMs have to reach a certain amount of use to meet these minimums.

Pooled data plans are best for those deployments were all of the SIM cards tend to consume the same amount of data. There are 2 ways that telecom companies structure Pooled data plans. One model, we call it the “Data Bucket” model, is where you buy a “bucket of data” and then you are allowed to add a fixed number of SIMs to use this bucket of data. An example of this might be where you are given choices of 1GB, 5GB, 10GB and 25GB of data. For the 1GB plan you might be able to add up to 250 SIMs, for the 5GB plan you can add up to 1000 SIMs, etc. The other model, we call this “True Pooled data” is where each active SIM card contributes a certain amount of data into to the overall pool, and the amount of pooled data grows as you activate SIMs. 

The latter, True Pooled data, model is far and away the best and most flexible Pooled data model. The Data Bucket model pigeon-holes you into a set amount of data which the telecom thinks makes the most sense, and limiting the number of SIMs that can pool this bucket of data. The other drawback into the Data Bucket model is what if you don’t need 250 SIMs, then you will be charged more for service you don’t need. The True Pooled data model allows you to create any size plan you want. We have customers whose need is not 5MB or 10MB or 20MB per SIM, but their true average is 17MB, or 7MB, or 12MB per SIM and the True Pool data plan can handle any size plan you need; this is the most flexible in terms of data quantities.

We see Pool plans used in almost every type of solution because most projects tend to be singularly focused and all of the IoT SIM cards consume relatively equal amounts of data. One of the fastest growing categories we see these plans being used in is AgTech. While there are many solutions for Agriculture, each solution tends to have predictable data consumption rates. A good example of this is soil moisture meters. These instruments measure the amount of moisture in the soil at predetermined intervals and run 24/7 so the amount of data consumed by each instrument is fairly static. This is true if the IoT SIM card is in the device in the ground or in a gateway which aggregates data from many instruments. Other very common uses of the True Pool data plan are:

  • Alarms/Security
  • Internet Failover
  • Remote Video Broadcast
  • GPS Tracking
  • Connected Car
  • Smart Meter
  • Smart City
  • Many, many more

True Pooled data plans are not only flexible in terms of the amount of data but these plans are fully customized by the countries included in the data pool. Unlike the Data Bucket data plan model or the PAYG model, True Pooled data plans include as many or as few countries to meet your particular requirements. This customization is a fantastic way to keep the cost of the plan as low as possible because the roaming cost varies in each country. To eliminate more expensive countries which aren’t needed and keep only those countries that are needed, the chances are that the cost can be lower.

So, what are the cons of the True Pooled data plans and Data Bucket plans? These plans lack the flexibility of having your IoT SIM cards use different plans. All of the SIM cards in a pooled plan must be on the same plan, in with the same cost, and with the same list of included countries. Even with these limitations, we see over 90% of our new clients gravitating to our True Pooled data plans. 

If you have any further questions about the differences between PAYG and Pooled data plans, or if you are looking for a connectivity solution, we would love to hear from you. Because we offer both types of plans, we have valuable insight into each type of plan and can address any need you may have because of this flexibility. One of our IoT experts will be in touch with you if fill out our Contact Form. You can also email our team at

A Comparison of OneSimCard to Domestic US Carriers (AT&T and Verizon) for IoT SIM Card Pooled Data Connectivity


We wanted to look at our service and see how it stacks up to some of our competition – Domestic USA IoT cellular carriers AT&T and Verizon.* We chose these two networks because they have the largest footprint and overall highest ratings for their network connectivity. For the purpose of this example, we are going to assume 500 IoT SIM cards, each with a 50MB pooled/shared monthly plan.

AT&T offers a variety of SIM cards and connectivity options that range from Domestic USA to North America and International options. They also break their services down by NB-IoT/CAT M and full LTE depending on the speed you need and overall performance (e.g., battery life) you need. AT&T offers a “Steered” data SIM where they force all of the data to be transmitted over their network, so long as there is even a slight signal; they do not want to allow you to roam on another network if at all possible. They also have limitations on the amount of SIM cards that can be on an account/pool – 500. 

Verizon has a more streamlined set of plans because for their IoT SIM card plans they are only offering NB-IoT or Cat M/M-1 plans. These are also Steered plans, and there does not seem to be a limit of SIMs that you can put onto an account, but the speeds are limited to just NB-IoT and Cat M/M-1 making data heavy solutions very difficult.

Here in the USA, OneSimCard offers a single Multi-Network, Multi-IMSI IoT Sim Card which operates on AT&T, & Verizon, as well as T-Mobile. We also operate in over 160 countries and over 400 other networks around the world on that same single SIM card. We do not ever “Steer” your traffic like the domestic, “native” SIMs . So that is 3 concurrent networks on each IoT SIM card. OneSimCard IoT also operates in over 160 countries and over 400 other networks around the world. We allow your device to make the decision as to which network to attach…always allowing the best signal and offering tremendous redundancy built-in. 

Our IoT SIM card solution operates on 2G/3G/4G (Full LTE and Cat M/M-1) so if you have a solution that requires faster speeds, we can accommodate this need with the same SIM card that also operates on the slower Cat M/M-1 protocols. We also offer a flexible, fully customized offering for data plan sizes. From 0.5MB to 1000TB and beyond, we can create ANY size plan to fit your needs, instead of forcing you into a plan we dictate. 

Here is a table of these comparisons, including monthly shared data plan costs:

OneSimCard IoT Verizon ATT
No Steering SIM
Single SIM – all 3 Major USA Networks
2G/3G/4G Full LTE & Cat M/M-1 on Single SIM
Flexible/Custom Plan Sizes
Number of Included Countries 76 1 1
50MB Plan/SIM Monthly $5.50 $15.00 $12.00
Cost for 500 SIMs  Monthly $2,750.00 (no additional fees $7,500.00 (+fees) $6,000.00 (+fees)

This chart demonstrates how the OneSimCard has many features that the domestic carriers do not have and you can save over 60% while still using their networks + T-Mobile! What’s more, the cost in the chart provides access in 76 countries for our International IoT SIM Card, but the listed AT&T and Verizon’s data plans only include the USA – if you want international, you will pay even more. OneSimCard is also the best choice if you are looking for a true partner willing to be flexible with plans, and tailoring the solution based on your individual needs. We have in-depth conversations and needs-analysis meeting with all of our clients and develop each solution to each of our clients instead of trying to fit your project into rigid, “cookie-cutter” data plans.

Speaking of solutions, OneSimCard IoT works with many different IoT verticals, including:

  • Fleet Management
  • Connected Vehicle
  • Asset Tracking
  • Digital Signage
  • Wearables
  • Ag-Tech
  • Telemedicine
  • Smart Cities
  • Custom Projects

OneSimCard IoT SIM cards are managed on our proprietary OSCAR platform. Our Cloud-based Platform is available from any browser and on the Apple App Store and on Google Play. This allows you to manage your entire global deployment of SIM cards from virtually anywhere!

If you would like to compare our IoT SIM cards to your current provider, please get in touch with us. We will be glad to discuss your particular needs and develop a testing protocol for your organization.

*Comparison based on published plans as of 8/18/2021