Geohot, the creator of purplera1n ^[1], has just released his own iPhone 3GS software unlock and named it purplesn0w. Who is purplesn0w for? If you own a jailbroken iPhone 3GS running firmware 3.0 and you want to unlock it to use it with another carrier (T-Mobile only in the USA), then purplesn0w is for you. Are you experiencing wifi/battery/other unlocking problems after using ultrasn0w ^[2]? Then I highly recommend you try purplesn0w. Geohot says that it’s the best unlock out there.

purplesn0w doesn't run any deamon (resident app) on the iPhone, it just patches three files: CommCenter, lockdownd, and wildcard. You need an activated device in order to use purplesn0w, this is a minus.

Here is how to install purplesn0w:

• Make sure you have an activated iPhone 3GS. If you have T-Mobile make sure you disable 3G in the settings.
• Open Cydia, and add http://apt.geohot.com to your sources
• Install the com.geohot.purplesn0w package
• Watch for the success output in Cydia
• Reboot your iPhone 3GS

Once you have followed the steps above, your iPhone 3GS should be unlocked.

Update: Geohot has also posted technical details of purplesn0w here ^[3] along with the source code of purplesn0w. He plans to release an updated version of purplesn0w with hactivation support.

via quickpwn