Well if those hobbyists who have a niche for doing the impossibles have failed to unlock the iPhone 4/3G/3GS Running iOS 5.0.1, here is a helping hand.
There is new version of UltraSnow 1.2.5, which has been recently released which add the ability of unlocking iPhone 4 and iPhone 3G/3GS devices running the latest iOS 5.0.1 firmware.
This unlocking tool like others before run on jailbroken devices only. To see the complete list of baseband versions it support, visit our previous post which details every baseband version this new tool supports. Following is the procedure that details the step for unlocking your iPhone so that you can use device on any GSM sim.
Here is how it goes:
Step 1: Start Cydia on your iPhone 4/3GS and go to add sources.