Caller IDs all unknown

[chromosaurusrex]

When I get an incoming call my phone says number unknown instead of the number even if the number is someone in my contacts. The last time an incoming call had a number on it was 24/12/23 but since 30/12/23 every incoming call says number unknown.

I had this issue before last May/June after the migration from Virgin mobile to o2 and this was resolved at the time by o2 support but it has now reoccurred. I tried phoning the support line but the other end of the call couldn't hear me even though I checked my phone's mic with voice recorder and it picked me up fine. 

[JumpingRabbit]

Yes, I have mentioned that to them but they don’t seem to think that’s the issue. I’ve checked on my account and it says my porting is still in progress despite the fact it was supposed to finish on the 10th of December. They think it might be an issue with the porting but I’ve directed them to this thread and many others that mention this bolt on so hopefully they’ll keep it in mind when they work in the issue