After 2 months of having a locked iphone 4 on BB 04.11.08, I decided that AT&T and Apple have won and I no longer have the patience to sit around and wait for a potential software unlock with no ETA. My contract with T-Mobile was over 6 months ago so I left them today and joined AT&T (well technically, their prepaid GoPhone). I got home and inserted my new $25 GoPhone micro-sim into my iphone 4 and it loaded right up! If I would've known that it was all it took to unlock my iphone, I would've done this 2 months ago. Has anybody else given up too?