Older 4G devices might not be 4G Calling compatible. You can check yours on our device support hub. Pick your device then go to Specifications, Network, then 4G Calling.
If your phone’s 4G Calling compatible, you need to make sure it’s turned on in your device settings.
4G ready devices that aren’t 4G Calling compatible will still be able to send and receive text messages, and use 4G data on a temporary basis – but cannot make calls using our 4G network.
Once our 3G network has been switched off, data and text messages won’t work.
If you’ve got a 4G data only device, such as a tablet – you’ll stay connected to our 4G network.