Here is the guide to unlock your iOS 5.0.1 based iPhone 4 on 01.59.00. baseband using the recently released UltraSn0w 1.2.5. Let's get unlock your iOS 5.0.1 on iPhon 4 by following the tutorial below:
- Jailbreak your iPhone 4 first, using the Redsn0w or Sn0wbreeze v2.8b11. Head to this link to do so: Jailbreak iOS 5.0.1 For iPhone, iPad, iPod With Redsn0w 0.9.9b9b For Mac And Windows.
- Once you've done with the jailbreak business, now launch Cydia that is on your Home Screen.
- Now add this repo url: http://repo666.ultrasn0w.com, by taping on Manage, and then Source >> Add (add the url here).
- Cydia will start refreshing and adding the packages of Ultrasn0w, tap on the repo and install the Ultrasn0w.
- Once, the process is completely finished. You will have the unlocked iPhone 4 in your hand.