on 25-07-2025 14:30
on 25-07-2025 14:34
on 25-07-2025 14:34
Check you havent turned any diverts on.
If not then you will need to contact o2 Guide: How to find help & contact O2
on 25-07-2025 23:00
Is your sim active?
Does mobile data work (not wifi)
Do you have a signal showing on the phone screen?
What phone is it and where / when did you get it?
Have you any outstanding bills?
So many possibilities that need so much more info from you to diagnose.