3G network switch off in the UK: What you need to know
The UK is in the process of switching off its 3G mobile networks. This transition is happening throughout the year, and it's important to be aware of how it might affect you.
What’s happening with the 3G switch off in 2025?
Mobile network providers have been gradually phasing out 3G to free up 4G and 5G networks providing more reliable connectivity. Whilst the switch off has been ongoing for a period of time now, O2 will be the final mobile network operator to complete its 3G switch off this year.
Mobile providers have been actively contacting known people who have 3G devices to ensure everyone affected is informed, and they are on hand to provide further information and support to those who need it. Here's what you need to know and the actions you may need to take.
When is the 3G switch off taking place?
Vodafone, Three and EE have already completed their 3G network switch offs. O2 has begun switching off its 3G network in some locations and will complete its programme by the end of 2025.
Which devices will be affected?
Phones and tablets
If you have a smartphone after 2013, it will likely support 4G, and you won't experience any disruption.
However:
- Older devices that only support 3G will no longer be able to connect to mobile data services
- Some feature phones and basic mobile phones might lose functionality
- Calls, texts and emergency calls, will still work on 2G networks.
What steps should be taken now?
Check device compatability
To check if a phone supports 4G:
- iPhone users: Any iPhone 5 or newer supports 4G
- Android users: Look in Settings > Network & Internet > Mobile Network > Preferred Network Type
Alternatively contact the network provider to check the device’s compatibility or use O2's device checker.
Where to get support
If you are concerned someone might be affected by the 3G switch off they can:
- Contact the mobile network provider directly
- Visit their local phone shop for device assessment
If you are supporting someone who could be affected - additional support is available. Network providers have dedicated support lines to provide help.
You can find information on Ofcom’s website.
For more information from O2, as well as Tesco Mobile, Sky Mobile and Giffgaff who use
O2’s network, click the links below: