How-to Unlock iOS4 05.13.04 baseband using ultrasn0w
Now, you can unlock any iPhone with 05.13.04 baseband by using ultrasn0w 0.93.
If you have a factory unlock (FU) iPhone, you do NOT need to read this guide, because your iPhone has unlocked already
You need to jailbreak your iPhone before you can unlock it. Read any of these tutorial to jailbreak your iPhone.
The baseband version of iOS4 is 05.13.04. Now, you can unlock 05.13.04 baseband by using ultrasn0w 0.93. Check your baseband version and make sure the baseband version is 05.13.04 before you continue reading this guide.
Here are steps how to unlock your iPhone:
Add repository to cydia: repo666.ultrasn0w.com and then install ultrasn0w 0.93. Wait for few minutes, then you will have an unlocked iPhone.