Good news for those iPhone users, who mistakenly upgraded your to iPhone 3.1.3 OS from previous firmware and their iPhones are no more unlocked now as by upgrading to OS 3.1.3, iPhone's baseband upgrades to 05.12.01 as well and currently no unlock for 05.12.01 baseband is available. MuscleNerd, the member of iPhone Dev-Team in reply to a tweet announced that an unlock will be released for iPhone 3G/3GS 05.12.01 baseband on OS 3.1.3 in June! with the release of new iPhone 4.0 OS expected at WWDC 2010.
Here is the conversation which took place between MuscleNerd and EmmanueGT:
@MuscleNerd will there be a unlock software coming out for the 3gs 3.1.3 baseband 05.12.01 when the new iPhone 4g comes out??
@EmmanueGT yep..so don't sell or give away your 3GS :) (at same time, remember not to accept Apple FW upgrades in future)
[Image via iClarified]
As clearly inculcated by MuscleNerd, DON'T upgrade to iPhone OS 4.0, because doing so will upgrade your baseband again and you'll have to wait for its unlock tool to arrive. It's always recommended NOT to upgrade to latest firmware in a hurry, as you can loose your iDevice's unlock/jailbreak status after upgrade, wait for proper tools.
JB/Unlock Summary (OS 4.0) - As to iPhone OS 4.0, Dev-Team has released Redsn0w 0.9.5b4 to jailbreak iPhone 3G(ONLY) on OS 4.0 Beta-4, and GeoHot has also claimed to jailbreak OS 4.0 with blackra1n tool. We strongly recommend NOT to upgrade to iPhone 4.0 OS now, wait for proper unlock tool to arrive.
JB/Unlock Summary (OS 3.1.3) - If you are on OS 3.1.3, you may go through our step-wise tutorials to jailbreak iPhone 2G/3G/3GS and iPod Touch with Spirit tool, tutorial for iPad jailbreak on OS 3.2 is given here. You can also jailbreak iDevices on firmware 3.1.3 using redsn0w 0.9.4, sn0wbreeze, PwnageTool 3.1.5. Unlocking can be done using ultrasn0w or blacksn0w.Contact Us for News Tips, Corrections and Feedback