on 19-04-2020 14:15
on 19-04-2020 14:18
on 19-04-2020 14:21
Try taking the sim card out and gently cleaning. Reboot the phone
Keep checking the status as it isnt always up to date
If it's still the same after you will need to call customer service
You can download the My Network app and report the fault through there. O2 will send you updates when it has been checked