
Reliable cellular connections for remote maintenance, site networking, and backup—across national and network boundaries.
Over 1,500 companies worldwide rely on WhereverSIM














Whether it’s machines, equipment, or entire facilities: industrial routers and IoT gateways enable data transmission via cellular networks when a wired connection is unavailable or needs to be supplemented. They lay the foundation for remote maintenance, monitoring, and the integration of distributed systems.
The requirements vary significantly: Some routers continuously transmit operational data, while others are used only for maintenance access or as a backup in the event of a main line failure.
With the right IoT SIM, you'll stay reliably connected anytime, anywhere.


With WhereverSIM, you don't have to worry about changing network coverage, different mobile carriers, or managing individual SIM cards. We provide the right connection so you can keep track of your machines and systems. Anytime. Anywhere.
By using our IoT SIM in your routers and IoT gateways, you’ll benefit from these features in particular:
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.
M2M routers are the right choice when it comes to efficient and secure solutions for industrial M2M communication. For example, they are particularly suitable for connecting locations or machines where networking via cable is not possible - especially in combination with the right M2M SIM card.
Whether for level indicators, control commands, image transmissions or remote maintenance of machines and systems: with our IoT SIM in an industrial router, you receive all data to be transmitted almost in real time via mobile communications - at any location via the strongest available network. We offer different data packages in our M2M tariffs to suit every application, from a shared data pool for all active M2M SIM cards to a KB-precise pay-as-you-go tariff.

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.
In general, our IoT SIM cards work in any router. However, commercially available routers are usually not designed for professional use and may cause malfunctions or downtime, resulting in unnecessary costs.
For fast, stable and, above all, secure operation, we recommend M2M routers optimized for commercial and industrial use. With our PreConfig package, for example, we offer you pre-configured M2M routers with which you can easily bring your devices online - plug & play.
If you need further assistance in selecting the right hardware, our M2M experts will be happy to help.
No. By default, devices that connect to the internet via our M2M SIM cards are not directly accessible from the internet.
The data connection is established using private IP addresses and an additional network technology (carrier-grade NAT) that blocks incoming connections from outside the network. As a result, routers and connected devices are protected by default against unauthorized access attempts.
If you need remote access to your devices, there are various solutions available—such as VPN connections or custom network configurations with static IP addresses. We would be happy to advise you on selecting the right solution for your specific needs.
No. In addition to Teltonika, we also offer routers and gateways from other established manufacturers. This allows us to select the right hardware for a variety of requirements and applications—from simple remote applications to complex IoT projects.
Together, we'll find the solution that best suits your specific application, both technically and economically. We'd be happy to advise you on suitable routers, gateways, and connectivity solutions.
More than 20 years of experience, 100% focus on the customer, Hanseatic reliability. WhereverSIM stands for reliable and secure SIM card solutions for M2M and IoT routers, modems and industrial M2M communication. We support our customers in the limitless networking of industrial machines and systems.
Together with strong international partners, we are continuously developing our services, always at the cutting edge of technology, always with our customers' needs in mind, always at eye level. Perfectly suited for LTE backup, remote maintenance, remote monitoring 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.