You Will Soon Be Able To Downgrade iPhone 3GS / 3G 06.15.00 Baseband To 05.13.04 With Working Unlock+GPS

One of the biggest reasons why people jailbreak their iPhone is to get it unlocked for use on unauthorized wireless networks. Although there are other unlocking solutions available, Ultrasn0w is the de-facto standard when it comes down to it because of one very simple reason: it’s stupid-easy to unlock an iPhone with it (unlike Gevey SIM), At least for an iPhone with a supported baseband.

Currently, Ultrasn0w can unlock iOS 5.1.1 on iPhone 4/3GS with support for five basebands. One of these is 06.15.00 which, as some of you will know, is an iPad baseband which people were required to upgrade to in order to unlock their locked device. One big problem with 06.15.00 is that it breaks the iPhone’s GPS feature so you can’t use it for navigation.

The solution to this problem will be here soon in the form of a downgrade from 06.15.00 to any other previous baseband. Details after the jump!

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