Unlock iPhone 4 And iPhone 3GS With New Ultrasn0w 1.2.2 on iOS 4.3.2
Important: You must ensure that the iPhone 3G, running BB 5.14.02 or 5.15.04 should upgrade to 6.15.00. Follow here to upgrade your baseband.
So, before you open the device, you must make sure your device is successfully jailbroken 4.3.2 is Ios. If you’ve jailbroken your device, you can follow here Sn0wbreeze Jailbreak (Windows) or you can follow here for Redsn0w (MAC) Jailbreak
Lets start with unlocking your iPhone, simply follow the steps:
Step 1: First of all Go to “Cydia” then “Manage Tab”
And then click “Add Source”
Step 4: Once the Repo has been added, Just search for “Ultrasn0w” in Cydia and Install it.
Step 5: Click Install, And then Restart your iPhone.