Cannot send SMS from New Iphone

Hi guys....

I can receive MS, but don't appear to be able to send. I get "error sending message"

I have put my SIM card (already O2) into the new phone - everything else seems OK..

Ant Ideas?

Jm

Update:

It was the SIM card - I got a new one from O2 - now OK

Jim

Id have the SIM replaced.

Did you try to turn off and on your phone?THis can be done to refresh your phone...