A new version of iOS is out for iPhone and iPod touch, dubbed as iOS 4.0.2. If you have jailbroken this firmware on your iPhone already, then you must now be in a mood to unlock your iPhone to catch a signal from your favorite carrier.

Fortunately, the case with the new update is that they have not updated the baseband, which means that tools which were used to crack the baseband of iOS 4.0.1 firmware would work just fine for this baseband, which is baseband 05.13.04.

To unlock your iPhone on iOS 4.0.2 with Ultrasn0w, simply follow the steps given below:

• Before unlocking your iPhone, make sure that its already jailbroken. If not, then follow this guide closely on how to jailbreak your iPhone on iOS 4.0.2
• As Redsn0w wouldn’t activate your iPhone, you would have to do it yourself by using the original carrier SIM. If you don’t have one, then see our post on how to activate iPhone without using the original SIM.
• When you are done with activation, simply follow the steps posted here on how to unlock your iPhone with Ultrasn0w and you should have an unlocked iPhone in the end if you have followed every step properly.

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