I have an iPhone 2G and have been using an O2 sim for the past year. I've now bought an Orange sim, but am getting the message 'Different Sim Detected'.
Before getting the O2 sim, I used a Virgin sim in the iPhone with no problems- I didn't even unlock it- but now when I put it in i get he 'Different Sim Detected' message.
What do I need to do to get the Orange sim working?
I'm using OS 3.1.3