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How to jailbreak and unlock iPhone 4 / 3GS on 5.0.1 with Ultrasn0w 1.2.5 and Redsn0w 0.9.9 b9d ? Today Phone Dev-team released ultrasnOw 1.2.5 to unlock iPhone 4 and iPhone 3GS on iOS 5.0.1.
As we told you earlier that ultraslOw 1.2.5 is only minor update to unlock the already unlockable basebands on iOS 5.0.1 for iPhone 4 and iPhone 3GS.
Ultrasn0w 1.2.5 support the below basebands :
How to know your iPhone’s baseband version:
Go to Settings > General > About > Modem Firmware
To unlock iPhone 4, 3GS with ultrasnOw 1.2.5 on iOS 5.0.1:
You MUST jailbreak your iPhone 4 or iPhone 3GS with Redsn0w or sn0wbreeze using custom ipsw firmware to preserve your old basebands to be able to unlock your iPhone with ultrasn0w 1.2.5.
Step 1: Connect your iDevice with your PC via USB and open Redns0w you just downloaded above.
Step 2: Start Redsn0w, press on “Extras” > “Custom IPSW” and then point Redns0w to iOS 5.0.1 ipsw firmware that you downloaded above.
Now Redsn0w will start cooking your custom iOS 5 ipsw firmware
Step 3: Click on “Pwned DFU”
Step 4: Now make sure your device is both OFF and PLUGGED IN to the computer before you click “Next”.
At this stage you will be presented with a screen where you will be guided on how to enter DFU mode. Quickly hold “Power” button and then while holding the “Power” button, you will now have to hold “Home” button too. Now after few seconds release “Power” button but keep holding “Home” button until installation begins.
Step 5: Open iTunes then Restore your iPhone 4, 3GS to the Custom iOS 5.0.1 ipsw (the file name begins with NO_BB).
Step 6: Now Open Cydia > Manage > Sources > Edit >
Add then write the following repo :
Step 7: After installing this repo, tab on search and search for ultrasnOw then install it.
GD P.S.: now you have unlocked iPhone 4, 3GS on 5.0.1 using ultrasn0w 1.2.5