If you manage connectivity for telecare alarms, remote patient monitoring kit, or ambulance equipment anywhere in the UK, there's a deadline you can't plan around forever. By 31 January 2027, the old analogue phone network — the PSTN — is being switched off for good, and every device still quietly relying on a landline socket needs a new way to call for help.

This isn't a distant IT problem. Ofcom's own figures show landline customers still on the old network fell from 5.2 million in July 2024 to 3.2 million in July 2025 as migration accelerates, and telecare has repeatedly been flagged as one of the hardest groups to move safely. That's exactly the gap GleeSim's IoT SIM 500MB for Social Care and Telecare Connectivity is built to close — giving telecare pendants, health alarms and monitoring devices a dedicated mobile data connection that doesn't care whether a copper line is still working.

Why the PSTN Switch-Off Is a Telecare Problem, Not Just a Landline One

Most people picture the PSTN switch-off as a home-phone story: households moving from a corded handset to a digital voice service over broadband. For social care and health providers, the real story is quieter and more urgent. Thousands of telecare alarms, fall detectors, and monitoring units were designed decades ago to dial out over an analogue phone line whenever something goes wrong. Once that line is gone, a device that was never tested on a digital connection can simply fail silently.

The scale of the challenge is why the switch-off has already slipped once. According to the House of Commons Library, the industry originally targeted a switch-off date of 31 December 2025, but migration was paused twice specifically because of concerns about customers who rely on landlines or devices such as telecare alarms. Digital phone lines also behave differently in a power cut than an old copper line did, which is exactly the scenario a telecare user is most likely to need a working alarm.

None of this means panic is the right response. It means connectivity that doesn't depend on a single copper line — or even a single mobile network — has moved from 'nice to have' to a core part of any telecare deployment plan.

The Risk Hiding Inside a Single-Network SIM

Once a device moves to cellular connectivity, it's tempting to assume the job is done. But a SIM tied to one mobile network carries its own version of the same problem the PSTN switch-off exposes: a single point of failure. If that network has a local outage, a coverage gap inside a building, or a fault at a mast near a patient's home, an alarm or monitor on that SIM can go quiet at the exact moment it's needed most.

For anything safety-critical — a fall alarm, a cardiac monitor, an ambulance data link — that risk is hard to justify when multi-network alternatives already exist at a comparable cost.

What the GleeSim IoT SIM 500MB Actually Offers

The IoT SIM 500MB for Social Care and Telecare Connectivity is built specifically for this kind of always-on, safety-related device rather than for general mobile browsing. Its core features: