Signal

[Zackstann]

For the last 24hrs I have had no signal and I am unable to send or receive text messages or any calls and I can’t swap to WiFi calling as I need signal to receive the message to allow it to happen 

[Bambino]

@Zackstann Download Skype Guide: A Guide to Skype to call customer service on 0800 902 0217 and get WiFi calling enabled on their end. 

You can also reach O2 via social media:
Facebook (https://o2uk.co/O2CFB), Twitter (now X) (https://o2uk.co/O2CTW), or Instagram (https://o2uk.co/O2CIG)

Then see this: Wifi and 4G Calling | Help & Support | O2

[Oxonian]

@Zackstann 

Might be worth checking for network issues in your area :-

O2 | Service Status

https://status.o2.co.uk/