If you are hoping to unlock your iPhone 3GS on the official iOS 5 firmware you are in luck. The Dev-Team have released a new version of UltraSn0w (UltraSn0w 1.2.4) which supports unlocking the following basebands:
- 06.15.00 (Special iPad Baseband)
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 3GS is running one of the baseband specified above you can successfully unlock your iPhone 3GS on the official iOS 5 firmware. Continue following the how to guide below to learn how to unlock your iPhone 3GS on iOS 5.
Note: In order to update to the official iOS 5 firmware and still preserve your baseband so it is unlockable, you will need to follow our in-depth how to guide by clicking here. DO NOT under any circumstance update to iOS 5 or you will update your baseband in the process. You will need to create a custom IPSW through RedSn0w or Sn0wBreeze (click here for more info).
Unlock the iPhone 3GS on the official iOS 5 firmware
Step 1) - As we noted above you must already be running the official iOS 5 firmware on your iPhone 3GS (click here if you are not), and you must also be jailbroken on iOS 5. If your iPhone 3GS is not jailbroken please click here.
Step 2) - After your iPhone 3GS is running the official iOS 5 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 1.2.4. Read through the description and tap the install button to install UltraSn0w 1.2.4 to your iPhone 3GS running iOS 5.
Note: In case you are not familiar with UltraSn0w, it is a software unlock for your iPhone 3GS meaning you can use your iPhone 3GS with any carrier by simply inserting the SIM card.
Step 7) - When UltraSn0w is installed you must restart your iPhone 3GS and run RedSn0w to boot tethered, you’re done!
Your iPhone 3GS should now be fully unlocked running iOS 5. Let us know if you have any questions in the comment section below…