A while back the iPhone Dev Team released the latest unlock for the iPhone 3G/3gs. This unlock had a unique workaround–use PwnageTool/redsn0w to inject the iPad’s baseband (which was unlockable)Â into the iPhone 3G/3GS. Then, use ultrasn0w via Cydia to do the rest.
Caution: iPad Baseband Causes GPS to Fail
Recent usage of this unlock has caused the GPS to fail. Therefore, only attempt this if you absolutely need to have your iPhone 3G/3GS unlocked. Remember, once you update to 06.15.00, you will be unable to downgrade your baseband.
Here’s the update posted on the Dev Team’s blog:
Update #5: Â Unlockers have been reporting mixed results about GPS functionality at 06.15.00. Â Until we can track down what differentiates those who retain GPS vs. those who lose it, be conservative and assume youâ€™ll lose GPS at 06.15.00. Â As we work on finding the cause (and possibly a fix), please report your personal findings in our comments section. Â (Update: early indications are that while 06.15.00 is capable of GPS, it will require some further hacks. Â But please still be conservative and assume you will lose GPS at 06.15, in case the hacks donâ€™t work).
Here are a couple other updates regarding the iPhone 3G/3GS unlock:
Update #6: Â Developer @sbingner (author of TetherMe) has made some excellent progress devising a new hactivation method that kills two birds with one stone for all you ultrasn0w unlockers. Â His tool, â€œSubscriber Artificial Module (SAM)â€ tricks your iPhone and iTunes into creating legitimate activation tickets even though youâ€™re unlocked with ultrasn0w. Â This means you get the full benefit of push applications, and your battery life increases substantially. Â If youâ€™d like to try it out, check out http://www.bingner.com/SAM.html
To help make it easier to try out @sbingnerâ€™s tool, weâ€™ve updated redsn0w to include a new â€œDeactivateâ€ option for the 3G and 3GS. Â Use this option *after* youâ€™ve installed SAMâ€¦it will remove the normal patches made to lockdownd and let SAM take over. Â (sbingner plans on making a button to do this within SAMPrefs too). Â Great work, @sbingner!
The new redsn0w with the â€œDeactivateâ€ option is at:
As always, use caution and due diligence when attempting any of these unlocks.