This tutorial is about unlocking iPhone 3G firmware 3.1 via Ultrasn0w. iPhone 2G users can unlock and jailbreak their iPhone using PwnageTool here. As far as iPhone 3G users are concerned, they are requested to wait until Dev-Team releases a new version of Ultrasn0w to unlock iPhone 3GS.

Good news. Finally Dev-Team have released PwnageTool 3.1 to jailbreak iPhone 1G, 2G and 3G. Unfortunately this release of PwnageTool will not unlock iPhone 3GS plus the new iPod Touch. PwnageTool 3.1 is available for download and now unlocking or jailbreaking iPhone firmware 3.1 is not a big deal.

Yes now you can revert back your iPhone 3GS firmware 3.1 to firmware 3.0. Previously we shared method to downgrade your iPhone firmware from 3.1 to 3.0.1, however this time Jay Freeman found a way to downgrade from firmware 3.1 to 3.0. Jay Freeman is the developer behind the well-known Cydia store for iPhone. Note that the process below will only work for those who have saved their SHSH to Cydia Server. You may read more about SSH from this blog post by Saurik. This process will downgrade your iPhone firmware from 3.1 to 3.0 but you baseband firmware will not be downgraded which means you won’t be able to unlock it for now.

If you have upgraded your iPhone (3G, 2G) firmware to 3.1 then you might have lost your Ultrasn0w lock forever (Dev-Team). Fortunately there is way to revert back / downgrade your iPhone firmware 3.1 to firmware 3.0.1 if you have iPhone 3G or iPhone 2G. The procedure below might not work on iPhone 3GS. After you might have downgraded your iPhone firmware to 3.0.1, you may jailbreak it by using the iPhone OS 3.0.1 jailbreak guide.

Yes just like firmware 3.0, now you can update iPod Touch firmware 3.1 for Free. For all those who have purchased firmware 3.0, they can upgrade to firmware 3.1 for free but all others who have got firmware other than 3.0, they must pay $4.95 to upgrade to 3.1. However if you want to update without paying a single penny to Apple then follow these simple steps to update your iPod Touch Firmware to 3.1 for FREE!

iPhone Firmware 3.1 is now available for download for all existing iPhone and iPod touch users who have purchased iPhone Firmware 3.0.1. Its comes with many new features and many bugs are fixed now. If you have jail broken or unlocked you iPhone, then DO NOT update this firmware until Dev-Team releases upated updated versions of redsnow and ultrasnow for firmware 3.1 else you will lose your ultrasnow unlock FOR EVER.

For all those who are interested to update their iPhone firmware to 3.1, they are requested to wait until Dave-Team releases a Redsn0w and Ultrasn0w which can actually unlock firmware 3.1. If you will upgrade to firmware 3.1 now then you will lose your Ultrasnow unlock forever. You wont be able to recover your baseband firmware. Up-till now feel free to unlock iPhone OS 3.0.1 Firmware which is compatible with Redsnow.