UK mobile operators switched off 3G across 2024 and 2025 and are retiring 2G towards 2033, with some moving sooner. Many dedicated lone-worker alarm devices, and some of the signalling paths behind them, were built for 2G or 3G. When the network a device uses is switched off, the device can stop sending alarms, often without any obvious warning. The safe response is to find out what each of your devices actually uses, replace anything that is 2G or 3G only with 4G or an app on a modern phone, and test that an alarm still gets through.
What is being switched off, and when
The UK networks have already retired their 3G services across 2024 and 2025, freeing the airwaves for 4G and 5G. 2G is being kept longer, under a government agreement to run it until around 2033, but operators are free to move earlier and some are signalling that they will.
For most phones this is invisible, because a modern handset simply uses 4G or 5G instead. The problem sits with older, single-purpose hardware that was only ever designed to talk to a 2G or 3G network.
Why lone-worker devices are exposed
A lot of dedicated lone-worker alarms, fobs and devices in use today were specified years ago, when 2G and 3G were the obvious choice: cheap, low-power and widely covered. Some of the signalling paths used to carry an alarm to a monitoring centre were built the same way.
When the network a device relies on is switched off, the device does not announce it. It carries on looking normal, the button still presses, but the alarm has nowhere to go. That is the dangerous failure mode: a safety device that looks fine and does nothing when it is needed.
What to do about it
Audit what you have. For each device, find out from the supplier which network technology it uses, 2G, 3G, 4G or a mix, and whether it falls back if its primary network goes. Anything that is 2G or 3G only is on borrowed time.
Plan the replacement. The two routes are a current 4G or LTE device, or moving to an app on the smartphones your people already carry, which use 4G and 5G by default and update over the air. Then test: raise a real alarm from each device or app and confirm it reaches the response, which is the only proof that counts.
How Vygard sits with this
Vygard is primarily an app on current iOS and Android phones and watches, so it rides on 4G and 5G and is updated remotely rather than depending on ageing device radios. Where a role needs dedicated hardware, we supply current 4G devices, and for places with no mobile coverage at all an alert can still go out over a paired satellite communicator.
If you are not sure what your current devices run on, that is the thing to check now rather than after an alarm fails. Talk to us at /contact or see the platform at /demo.
Frequently asked questions
- Has 3G been switched off in the UK?
- Yes. The UK mobile operators retired their 3G networks across 2024 and 2025. 2G is being kept longer, toward around 2033 under a government agreement, though operators may move sooner. A device that relied on 3G will already have lost that network.
- How do I know if my lone-worker device uses 2G or 3G?
- Ask the supplier which network technology each device uses and whether it falls back to another if its primary network is withdrawn. If a device is 2G or 3G only, plan to replace it. If you cannot get a clear answer, treat that as a reason to move on.
- What should we replace old devices with?
- Either a current 4G or LTE device, or an app on the modern smartphones your people already carry. Apps use 4G and 5G by default and update over the air, so they do not age in the same way. For no-signal areas, look for satellite or off-grid cover as a backstop.
- Will an app-based lone-worker system be affected by the switch-off?
- Not in the way old hardware is. A modern phone uses 4G and 5G, so an app like Vygard rides on current networks and is kept up to date remotely. The thing to retire is single-purpose hardware built for 2G or 3G.
Related articles
- The Safety Flaw Hiding in Every Panic Button
- Lone Worker Alarms and BS 8484: What Buyers Actually Need to Know
- Lone Worker Apps vs Dedicated Devices vs BS 8484 Alarm Services: What UK Employers Actually Need
- The Real Cost of Lone Worker Protection: Apps vs Devices vs Monitored Services
- Man Down Alarms: How They Work and How to Choose
- Off-Grid Lone Worker Safety: Getting Help Beyond Mobile Signal
Last updated 2026-10-28