Ok so I have the Iphone 3g with ATT, have had for awhile now. I'm currently traveling outside the US, so I needed to use a local service provider. I removed the ATT sim and replaced with the local sim.

I can acess wi-fi, buy music direct from my phone, and download apps all with no problem on the local networks - BUT when I try to plug it into my PC to update and to put some new music on my phone, it says that the phone must be activated with an ATT sim. Obviously it has already been activated!

How can I work around this to update my firmware and transfer music???