Supercharge your IoT devices with a resilient multi-net SIM card

IoT glossary

Supercharge your IoT devices with a resilient multi-net SIM card

Why Multi-net SIMs?

Multi-net SIM cards, also referred to as "super SIMs", "roaming SIM cards", or simply "multi-net SIMs", are the modern solution for IoT deployments demanding coverage resilience, cost-effective logistics, and global accessibility. By eliminating single-network constraints, multi-net SIMs ensure your devices stay connected wherever they are.

A multi-network IoT SIM offers several advantages over traditional single-network IoT SIMs, which we will discuss in more detail below.

Ease of deployment

Multi-network IoT SIMs allow for instant deployment by the end user, removing the necessity to physically visit the site and perform site surveys to identify the best single-network SIM(s). This approach not only facilitates the rapid deployment of solutions but also enables the end user to save costs by avoiding multiple site visits and managing different stock variations.

Stock management

Multi-network IoT SIMs are a single SKU, which means there’s no need to manage multiple different SIMs, you have access to multiple networks through one single SKU, further providing a cost reduction for the customer.

Resilience

A multi-network IoT SIM can provide additional resilience to a solution by allowing devices to connect to more than one MNO rather than being tied to one single provider. If you have one or more devices deployed that are using a single MNO SIM, if an outage occurs with that MNO, your solution will be offline for the duration of the outage.

With the multi-net or Cellhire’s Super SIM, several deployed devices (if capable) can roam onto an alternative MNO during an outage on a particular MNO, thereby keeping your solution online. This scenario also applies to non-static devices; as these devices travel along their route, they are likely to encounter blackspots in coverage.

Global coverage

Cellhire’s multi-network IoT SIMs not only operate across multiple networks within a single country, but they also provide extensive coverage in various locations. Permanent roaming agreements also support this, allowing devices to operate in countries for longer than the typical 90-day rule.

Industrial grade SIMs

Cellhire provides standard industrial-grade multi-network IoT SIMs. This provides a benefit to end customers because SIMs can survive in much harsher environments, withstand vibration, and handle more read/write cycles than a traditional IoT or consumer SIM.

Conclusion

In today’s fast-evolving connectivity landscape, resilience, flexibility, and scalability are essential. Multi-net SIM cards answer this demand by enabling seamless switching between networks, reducing downtime, and simplifying logistics with a single SKU. Whether you're deploying IoT solutions across the UK or globally, our super-SIMs or roaming SIM cards ensure continuous coverage, even in areas with patchy signals or during outages.

A multi-net SIM card is more than just a SIM – it’s a gateway to uninterrupted connectivity, simpler operations, and scalable deployment. Whether you're in logistics, healthcare, security, CCTV, digital advertising or any other IoT-driven industry, choosing a multi-net SIM solution helps you future-proof your operations and minimise downtime.

Try our IoT SIM free trial today or get in touch with our IoT experts here.

Last modified: 16/06/2025
Written by: Dan McDonnell