Unlock iPhone 3.1.3 For 3G 3GS Using Ultrasn0w

Good news here because now you can unlock you iPhone 2G, 3G and 3GS 3.1.3 Firmware with old boot roms, and you can also can keep your baseband during upgrading to the latest firmware which is iPhone OS 3.1.3

In other word, once you are able to jailbreak your iPhone with Sn0wbreeze then you can further unlock your 3G and 3GS using the latest version of ultrasn0w or Blacksn0w because both of them are compatible with the older baseband versions

Before we start to unlock iPhone 3.1.3 3G 3GS with ultrasn0w firstly you need to do the following:

1. Jailbreak iPhone 2G with Redsn0w if yours is iPhone 2G and has not been jailbroken yet
2. Jailbreak iPhone 3.1.2 Sn0wbreeze if yours is iPhone 3GS or iPhone 3G and has not been jailbroken yet
3. Let’s do it

After your iPhone is jailbroken then do these steps:

• Now open Cydia -> Touch Manage -> Touch Source

Disable 3G for T-Mobile users before installing ultrasn0w.

• Tap on Edit > tap on Add And then type when you are prompted to enter url source: http://repo666.ultrasn0w.com and touch on “Add Source”.
• Now search for Ultrasn0w (once the repository added) in Cydia then install it, and this app will do the job to automatically unlock your iPhone
• Restart your iPhone your iPhone 3G or 3GS on firmware 3.1.3 is unlocked now!
• Well done!