You'll need to post a bit more information than that if you want assistance from the Community Forum.
E.g. when was everything working ok last?
What exactly do you mean by "no coverage" and "connected to 48"?
That seems contradictory.
What exactly is/isn't working?
Connection to the 48 network - i.e. signal bars?
Incoming/outgoing calls?
Incoming/outgoing texts?
Mobile data?
If the issue is specifically with mobile data and it works while at home (via your home internet/WiFi connection?) but not when you leave the house then the most likely issue is that you need to configure your APN settings for mobile data to work.
If you need to contact 48 support about this then see the links in my signature below.
