Users relying on software carrier unlock ultrasn0w must use sn0wbreeze created custom IPSW firmware to upgrade there iDevice to an upgraded iOS version without updating the baseband which breaks the unlock. However, Apple iTunes prevents users from upgrading or restoring to these custom IPSW files and errors out the process with codes 3194 and 1600 - for which we have shared solution earlier. Here is an step-by-step guide to restore an custom IPSW file to iPhone using iTunes the correct way without any errors.

If you are stuck with an unlocked iPhone 3G waiting for a software unlock from iPhone Dev Team, here is some good news for you, the iPhone Dev Team has announced that an software based unlock application similar to QuickPwn for iPhone 3G will get released on New Year’s Eve, however only users having iPhone 3G's with 2.11.07 or earlier baseband will able to get the unlocker working, the unlock r