Install valid sim with no pin lock to activate iPhone
Today my iPhone froze with just the apple logo showing. So after searching the internet I found out that I need to restore it. So I connected it to iTunes and restored it to 4.0.1 from 3.0.1. However, once it started up again I got the error. It simply tells me 'Install valid sim with no pin lock to activate iPhone'. If I slide it open I get an emergency number.
What is going on? Im quite new to all this so could someone explain.
Thanks
3 GS, Windows 7