I bought a 3GS from eBay in the US, got the phone today and updated to 4.0, but rather than saying O2 it says AT&T, why is this? I have restored but no good. Anyone any ideas? I have uploaded a screen shot.
http://yfrog.com/3m47550738256bcbbc621boj
http://yfrog.com/3m47550738256bcbbc621boj