I have always got sms from family in Norway before but from last week I can send to Norway but when they send back I do not receive.
Any ideas?

Call 3?

are you on a plan? what plan?

I'm on 3pay pay as you go. I have called 3 and they say no known problems.

Maybe it's not leaving the senders phone, what network is the sender sending on and can they send to anyone else in the uk?