The iPhone Dev-Team has released the latest update to its ultrasn0w unlock tool for select models of the iPhone 3G, 3GS and 4 models with select baseband versions, limiting the scope of the unlock for the time being. The aforementioned models (iPhone 4 baseband 01.59 and 3G/3GS basebands 04.26.08, 05.11.07, 05.12.01 and 05.13.04) are compatible with the tool, while models with baseband versions outside the above will not be compatible.