

Over 1,500 companies worldwide rely on WhereverSIM
Whether it's a burglar alarm system, a hazard detection system, video surveillance, or temporary security systems: A reliable data connection is crucial for transmitting alerts and status information between the system and the control center or backend. This becomes particularly challenging when systems are installed at different locations.
With the right M2M SIM card, you can reduce your dependence on individual mobile networks and centrally manage the connectivity of your security systems.
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With WhereverSIM, you can reduce your reliance on individual cellular networks and manage your SIM cards centrally through a single platform. This leaves you with more time for what really matters in your projects: the reliable installation and operation of your security systems.
Alarm, fault, and status messages rely on reliable data transmission. WhereverSIM provides the foundation for this, across different locations and cellular networks.
Access to multiple mobile networks within a country (national roaming), e.g., in Germany: Telekom, Vodafone, and o2.
Thanks to network roaming, you always have access to the strongest mobile network in your location by default, regardless of the carrier.
>485 networks in over 189 countries for your M2M project. Near borders, devices automatically connect to networks in neighboring countries.
No throttling. The fastest possible local speed at all times.
As standard, our M2M SIM cards support data transmissions and SMS, voice calls on request.
Whether in the intruder alarm system (IAS), in the hazard detector or for construction site monitoring:
With our M2M SIM, we enable telecommunication systems of all kinds to transmit fault messages reliably and securely via mobile radio. We offer suitable and cost-effective M2M data tariffs for both low and high data consumption.
Regardless of where your company installs the alarm system, our M2M SIM card offers access to the strongest network at the location at all times with every tariff. In border areas, your end devices also have access to the networks of neighboring countries.

Unlike consumer SIM cards from network operators, our M2M SIM cards are not tied to a specific mobile network. Instead, they enable IoT devices to access all available mobile networks at their respective locations via national roaming. Since our M2M SIMs are set to unmanaged roaming by default, they allow devices to connect to the strongest mobile network at their location rather than to that of a preferred carrier.
Worldwide, devices that meet the minimum technical requirements can connect to over 485 mobile networks using our M2M SIM card. In Germany, our M2M SIM cards support all mobile networks operated by the three carriers—Telekom, Vodafone, and o2—with a single plan.
Yes. Modern LTE and 5G networks enable reliable live streaming, even with high-resolution video formats. In addition to data plans without throttling, a stable mobile connection is essential. Our M2M SIM cards provide this stability to end devices through non-steered roaming. This means the device can connect to the strongest local mobile network without prioritizing a specific carrier.
Yes. Through our online portal, where all M2M SIMs are managed, SIM cards can be paused free of charge when they are not currently needed. There are no charges for the SIM card while it is paused, and reactivation is also free of charge. This makes the SIM cards suitable for temporary use in monitoring systems, such as at construction sites or temporary events.
M2M SIM cards with access to multiple cellular networks are suitable for alarm systems and intrusion detection systems. Unlike traditional SIM cards from a single network operator, multi-network SIMs reduce dependence on a specific cellular network and thus offer greater flexibility when installing systems at different locations.
The WhereverSIM IoT SIM card provides access to multiple cellular networks and can therefore be used to connect alarm systems, EMA, and other security systems to cellular networks. For installers and operators of many systems, it also offers centralized SIM management, flexible data limits, and the ability to specifically exclude certain cellular networks. This allows even larger installations to be managed via a centralized connectivity solution and adapted to different requirements.
A multi-network SIM allows an alarm system to access multiple available cellular networks, rather than limiting it to a single provider’s network. This is particularly important because network coverage can vary depending on the installation location.
With unmanaged roaming , no specific cellular network is permanently prioritized; at any given location, an alarm system equipped with WhereverSIM always connects to the best available local cellular network. This reduces dependence on a single network operator and makes it easier for installers to equip alarm systems at different locations with the same M2M SIM solution.
More than 20 years of experience, 100% focus on customers, Hanseatic reliability. wherever SIM stands for reliable and secure M2M SIM solutions for alarm systems, fire alarms and security systems.
We support installers with our M2M SIM card for seamless monitoring and control of their systems and installations. Together with strong international partner companies, we are continuously developing our services, always at the cutting edge of technology, always with the needs of our corporate customers in mind, always at eye level. Perfectly suited for motion detectors, fire alarm systems, intruder alarm systems, alarm systems, telecommunication technology and much more.
Competent service and support in and from Germany.
All services are hosted in Europe and are subject to the strictest data protection regulations.
With 2-factor authentication, you can protect access to your WhereverSIM portal.