on 13-01-2021 09:49
on 13-01-2021 09:55
Have you tried rebooting your phone?
on 13-01-2021 10:04
on 13-01-2021 10:11
on 13-01-2021 10:11
This is usually just a temporary network issue O2 Service Status
4g calling should not impact the normal use of your phone though, but I would turn off calls over 4g in your phone settings to see if it helps.
on 13-01-2021 10:13
on 13-01-2021 10:15
on 13-01-2021 10:15
Network faults don't always effect everyone.
They can be random.
on 13-01-2021 10:24
on 13-01-2021 10:30
on 13-01-2021 10:30
on 13-01-2021 13:39
on 13-01-2021 13:39
It's possible they are simply working on your connected mast