The iPhone dev team has got the iPhone 3G unlock tool, Ultrasn0w 3.0 ready. The Ultrasn0w allows you to unlock the iPhone 3G that runs the firmware 3.0. Please note it can only unlock the iPhone 3G not the recently released iPhone 3G S.
The Ultrasn0w can unlock both iPhone 2G and 3G models. The dev team should have started working on a version for unlocking the iPhone 3G S, but no clear indication when it’s likely to be ready.
More info iPhone Dev Team
June 24th, 2009 at 8:37 am
[...] the Ultrasn0w, using the SIM unlock card does not need you to jailbreak your iPhone and no modification of [...]
July 4th, 2009 at 9:10 am
[...] attempting it. Hotz disagrees the approach that the iPhone Dev Team takes for their their own ultrasn0w unlock/jailbreak, which is they will only address the iPhone 3GS until OS 3.1 is generally released, so Apple will [...]