When was it working ok for you last?
Did anything change on the phone in the meantime?
Do you mean that there's no signal at all - I e. no signal bars?
What happens if you do a manual search for networks?
Can you see and connect to 48?
If not then what happens? Any error messages?
Or do you mean that just mobile data isn't working but calls and texts are?
In that case are your APN settings still configured correctly?
Do you know anyone else in the vicinity also on 48 to see if they're similarly affected?
If you need to contact 48 support about this then see the links in my signature below.
