You'll need to provide a bit more information than that if you want assistance from the Community Forum.
When were you last able to make calls ok?
What happens when you try to make a call?
Any error messages?
Can you receive calls?
Can you send/receive texts and use mobile data?
Do you have an active membership plan?
Do you have a connection to the 48 network - i.e. signal bars?
If not then 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.
