Earlier today we told you that UltraSn0w was updated to version 1.2.7 to support unlocking the iOS 5.1.1 firmware. Although we showed you how to unlock your iPhone 4 or iPhone 3GS already on the iOS 5.1.1 firmware using a hacked together version of UltraSn0w, dubbed UltraSn0w Fixer For 5.1.1, using the official solution is always a better idea as it is more stable and reliable. Thus, in this how to guide we will show you how to unlock your iPhone 4 or iPhone 3GS running the iOS 5.1.1 firmware using UltraSn0w 1.2.7.
UltraSn0w 1.2.7 Supported iPhone Basebands
- iPhone 4 on baseband 01.59.00
- iPhone 3G/3GS basebands 04.26.08, 05.11.07, 05.12.01, 05.13.04, and 06.15.00
*In order to see if you have one of the supported basebands on your iPhone 4 or iPhone 3GS you will need to go into the Settings.app > General > About and look for the Modem Firmware field.
How To Unlock iPhone With UltraSn0w 1.2.7
Step 1: You must already be running the iOS 5.1.1 firmware on your iPhone 4 or iPhone 3GS, and you must also be Jailbroken on the iOS 5.1.1 firmware. If your iPhone is not Jailbroken please click here.
Step 2: After your iPhone is running the iOS 5.1.1 firmware and is Jailbroken you will need to simply launch Cydia from your SpringBoard.
Step 3: Once Cydia is up and running you will need to go into the Sources page. To go into the Sources page tap Manage followed by Sources.
Step 4: Typically, the UltraSn0w repo is included with Cydia. If not, tap the Edit button followed by the Add button and you will be prompted to add a URL source. Type:
Followed by tapping the Add Source button.
Step 5: Cydia will automatically refresh and update sources.
Step 6: After Cydia is done refreshing sources. Tap the Search tab on the bottom tab bar and search for UltraSn0w. Once UltraSn0w appears, tap on it and you should see version 1.2.7. Read through the description and tap the install button to install UltraSn0w 1.2.7 to your iPhone 4 or iPhone 3GS running the iOS 5.1.1 firmware.
Note: In case you are not familiar with UltraSn0w, it is a software unlock for your iPhone meaning you can use your iPhone with any carrier by simply inserting the SIM card.
Step 7: When UltraSn0w is installed you must restart your iPhone, plug in your unofficial SIM card and wait for your iPhone to connect to your network.
Congratulations! You should now have an unlocked iPhone 4 or iPhone 3GS running the iOS 5.1.1 firmware. If you have any further questions or thoughts please leave them in the comments section below.