on 21-05-2024 01:02
on 21-05-2024 06:58
@daddyeeyore - check these out first:
Guide: Is the network down for me or everyone?
Guide: How can I sort out my network issues?
And see if lightly cleaning your SIM card with a lint-free cloth helps (try the other SIM tray or slit if your phone has dual SIM slots).
Good luck!
on 21-05-2024 08:02
You can use wifi calling when in range of a wifi network to call O2 or pop in store with photo ID and they can check phone and sim for you.
If a replacement sim is required, they will do that for you for free.
https://www.o2.co.uk/connectivity/wifi-and-4g-calling
You can also call using Skype over wifi if necessary Guide: A Guide to Skype
Social media is also an option if you use any of them Guide: How to find help & contact O2