You'll need to post a bit more information than that if you want assistance from the Community Forum.
When was it working ok last?
Did anything change since then?
E.g. phone software update, settings changes, factory reset/restore, new phone handset, returned from roaming abroad, etc.?
What happens if you do a manual search for networks?
Can you see and connect to 48?
If you need to contact 48 support about this then see the links in my signature below.
