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If you are hoping to unlock your iPhone 4, iPhone 3GS, iPhone 3G on the official iOS 5, iOS 5.0.1 firmware, you are in luck. The Dev-Team have released a new version of UltraSn0w (UltraSn0w 1.2.4 / 1.2.5) which supports unlocking the following basebands:
- 4.26.08 (iPhone 3GS/3G)
- 05.11.07 (iPhone 3GS/3G)
- 05.12.01 (iPhone 3GS/3G)
- 05.13.04 (iPhone 3GS/3G)
- 06.15.00 (Special iPad Baseband)
- 01.59.00 (iPhone 4)
To find out if you have one of the basebands specified above you will need to go into the Settings.app > General > About and look for the Modem Firmware field. If your iPhone is running one of the baseband specified above you can successfully unlock your iPhone on the official iOS 5, 5.0.1 firmware.
Note: In order to update to the official iOS 5, 5.0.1 firmware and still preserve your baseband so it is unlockable, you will need to follow our in-depth how to guide using RedSn0w. DO NOT under any circumstance update to iOS 5, 5.0.1 or you will update your baseband in the process. You will need to create a custom IPSW through RedSn0w or Sn0wBreeze.
Update #1: This article has been updated which now includes the iPhone 4 (01.59.00 baseband), iOS 5.0.1 firmware, and UltraSn0w 1.2.5.
Unlock iPhone 3G/3GS, iPhone 4 On iOS 5, 5.0.1
Step 1: As we noted above you must already be running the official iOS 5, 5.0.1 firmware on your iPhone, and you must also be jailbroken on iOS 5/5.0.1. If your iPhone is not jailbroken, follow our easy guides.
Step 2: After your iPhone is on iOS 5, 5.0.1 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 1.2.4 / 1.2.5. Read through the description and tap the install button to install UltraSn0w 1.2.4 / 1.2.5 to your iPhone running iOS 5, 5.0.1.
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 and run RedSn0w to boot tethered, you’re done!
If you have any questions, issues, or anything related to this article, let us know in the comments.