I've been using Samsung GT19305 for a couple of years on O2 - Giff Gaff.
I had it unlocked professionally and its been absolutely fine but today its gone "off network" and says it wants a Sim Network unlock PIN- What can I do?
thanks but haven't got a cable to connect to PC.
thanks - they fixed it but couldn't understand why it happened.
They were good - no charge.
Mobileponeexports.com - based in Ipswich