How to Unlock iPhone 3GS, iPhone 4 on iOS 5.0.1 [Step by Step Guide]


UltraSn0w 1.2.5 was released earlier today and it added support for iOS 5.0.1 and select basebands. Below is a tutorial to get your iPhone unlocked on iOS 5.0.1.

Step 1:

Make sure you have a compatible baseband for this unlock. To check this go to Settings > General > About and look at the “Modem Firmware” section at the bottom of the page. You can only unlock your device if you have one of the following basebands: 01.59.00, 04.26.08, 05.11.07, 05.12.01, 05.13.04, or 06.15.00.

Step 2:

Upgrade to iOS 5.0.1 and preserve your baseband when doing so (If you haven’t already)

Step 3:

Jailbreak your device. A tutorial for that can be found here.

Step 4:

Open Cydia and search for “UltraSn0w” then Install UltraSn0w 1.2.5. If it’s not there, add the source “” and then it should show up.

Step 5:

Remove your old SIM card and replace it with a new SIM card (e.g. a T-Mobile SIM). You may need to cut your SIM to fit the micro-SIM slot.

Congrats! You are now unlocked on iOS 5.0.1. If you run into any issues or have any questions, leave a comment below.

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