Doesn't "emergency calls only" mean that you still have a connection to the 48 network - i.e. signal bars?
Did anything change on your phone?
Software update, settings changes, factory reset/restore, new phone handset, returned from roaming abroad, etc.?
If you do a manual search for networks can you see and connect to the 48 network?
If you get a connection to the 48 network does anything work - incoming/outgoing calls, incoming/outgoing texts, mobile data?
If not what happens when you try?
Any error messages?
Do you know anyone else nearby on 48?
Are they also affected?
Have you tried reseating the SIM in case it has become dislodged?
If you need to contact 48 support about this then see the links in my signature below.
