. Supported modem basebands are listed below. Everything else is NOT supported.
Instructions to unlock iOS 5.1 using UltraSn0w Fixer for 5.1 Step 1:
- 01.59.00 (iPhone 4)
- 04.26.08 (iPhone 3GS)
- 05.11.07 (iPhone 3GS)
- 05.12.01 (iPhone 3GS)
- 05.13.04 (iPhone 3GS)
- 06.15.00 (iPhone 3GS)
You must first Jailbreak iOS 5.1 firmware using Redsn0w 0.9.0b6.
In order to proceed, be sure to preserve your baseband from being upgraded
. To do so, create custom IPSW iOS 5.1. iPhone 4 and iPhone 3GS owners can use redsn0w’s “Custom IPSW” button to create a NO_BB_* version of the 5.1 IPSW and restore to that instead of the stock one. If you try restoring your iPhone to a stock Apple IPSW, your iPhone will be locked. If you are already running iPhone with preserved baseband, skip this step and hop to Step 2. Steps to create custom 5.1 iOS firmware to preserve Baseband
- Launch Redsn0w, select “Extras”, and then select “Custom IPSW”.
- Locate your iOS 5.1 Stock firmware then the Redsn0w will run a number of background processes to create custom IPSW which is pre-jailbroken with preserved baseband.
- Navigate to Extras > Pwned DFU and restore to your custom iOS 5.1 firmware (created in step 2) using iTunes. or complete yourself.
After you have successfully jailbroken your device, launch Cydia from your iPhone Springboard. Step 3:
Go to the “Manage” tab, then tap “Sources” Step 4:
Tap Edit, then Add, you should get a dialog asking for a URL Step 5:
Enter this URL: http://repo.iparelhos,com
and then press ‘Add Source’. Step 6:
After the repository has refreshed and finished loading sources, Tap on the iParelhos repo
to see Ultrasn0w Fixer
utility. Step 7:
Select the Fixer utility, and tap on the ‘Install’ in the top right hand corner. Step 8:
Once installation is complete, go ahead and install ultrasn0w 1.2.5
. Step 9:
Reboot your iPhone and your iPhone should be unlocked on latest iOS 5.1 IPSW mobile operating system and Enjoy. Thanks all.