I'm a bit stuck and would highly appreciate any help!! I bought an iphone about 8 months ago, it came with a turbosim and was version 1.1.2 with installer etc on it. I've used it on my T-Mobile UK contract and never upgraded it but now that 2.0 is out I would love to upgrade it.
I have the AT & T sim card that was in the phone when I first opened it, can I upgrade it with this?? If not can you tell me the best way to go about it or even links to sites with instructions!!