If you are one of the unlucky few who rely on an carrier-unlock for iPhone 3G and accidentally updated to iOS 4.1 upgrading your baseband (modem) to v 05.14.02 which is not unlockable, here is a method to let you upgrade your baseband to one of iPad 06.15.00 which is fortunately still vulnerable and will allow us to unlock using ultrasn0w.

In this comprehensive step-by-step illustrated guide we will walk-trough the complete process of jail-breaking and unlocking an iPhone 3G running iOS 4.1 having modem version 05.14.02.