on 10-04-2020 18:42
on 10-04-2020 18:46
Take it out and reinsert it, reboot the phone and see if that works.
If not you may need a new sim and you will need to phone customer services for that Guide: How to find help & contact O2
Veritas Numquam Perit
on 10-04-2020 18:47
on 10-04-2020 18:47