My iPhone 4 Unlocked (used to have it on T-Mobile) Jailbroken 4.1 Firmware 1.59.00 baseband. My Plan AT&T prepaid, NO data Unlimited Texts I have read that Some T-Mobile users have said that Facetime works (in the US) But have gotten some $11 charge on their bill or something. Although Prepaid is AT&T will facetime only work with the official iPhone 4 AT&T micro-sim. My sim card was cut down to fit into my iPhone... Please someone who knows for sure let me know if this will work. I know you need unlimited messaging, and WI-FI of course. I have read speculation threads, but nothing with a for sure answer, thanks.