Hi All,

I have purchased an iPhone with 2.0.1 firwmare, it had older firmware on it, so I upgraded it to 2.2 firwmare, that brough me to baseband of 2.28.00

now i used pawnage tool (quick pwn) for windows, and it put cydia on it etc.

now i take the at&t sim card out and put t-mobile sim card, it basically says, "different sim inserted, please connect to iTunes"

and when I connect the iPhone to iTunes, it says, different sim installed.

Please let me know what to do?