Unfortunately, we do not currently support Wi-Fi (WiFi) calling - it is something we are working on with EE (our network provider) but currently they only allow if for their direct retail customers.
What is Wi-Fi calling?
Wi-Fi calling allows you to use a Wi-Fi network to make and receive phone calls, rather than using the traditional mobile network.
This benefits those in poor signal areas, such as rural villages and underground stations, as you'll be able to harness the power of available Wi-Fi networks to stay connected.
It's not just calls that are supported though, you can also send and receive texts.