Can you send/receive texts?
Can you use mobile data?
Do you have an active membership plan?
What happens when you try to make a call?
Any error messages?
What happens at the caller's end when they try to call you?
Any error messages?
When was everything working ok for you last?
What changed on the phone in the meantime?
If you need to contact 48 support about this then see the links in my signature below.
