How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Posted November 28, 2010 at 11:55pm by iClarified | Please help us and submit a translation by clicking here | 3721463 views
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These are instructions on how to unlock the iPhone 4, iPhone 3GS, and iPhone 3G for use with any GSM cellphone carrier using UltraSn0w. This will work with the iOS 4.2.1 firmware if you are on the 06.15.00 baseband.

Before you can follow these instructions you must have a jailbroken iPhone and you must be on the 04.26.08, 05.11.07, 05.12.01, 05.13.04, 06.15.00, or 01.59 baseband(modem firmware).

To find your firmware and modem firmware(baseband) versions you can follow this tutorial.

If you are on T-Mobile remember to turn off 3G before starting...



Step One
Press to launch Cydia Installer from your SpringBoard.


Step Two
Press to select the Manage tab at the bottom of the screen.


Step Three
Press to select the large Sources button


Step Four
If the ultrasn0w repo is not present press the Edit button at the top right of the screen. Otherwise, skip to Step Nine.


Step Five
Press the Add button at the top left of the screen.


Step Six
Enter http://repo666.ultrasn0w.com/ as the source url and press the Add Source button.


Step Seven
Once the source has been added press the large Return to Cydia button.


Step Eight
Press the Done button at the top right of the screen.


Step Nine
Press to select repo666.ultrasn0w.com from the list of user entered sources.


Step Ten
Press to select ultrasn0w from the list of packages


Step Eleven
Press the Install button at the top right of the screen.


Step Twelve
Press the Confirm button at the top right of the screen.


Step Thirteen
After installation completes successfully press the large Restart Springboard button.


Step Fourteen
You should now be able to insert the SIM of your choice!


***THANKS: A big thank you to all the members of the iPhone Dev-Team for all their hard work! It is much appreciated by all.

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Add Comment
ribas - July 9, 2014 at 9:05pm
nao funcionou, fiz como foi ensinado. did not work, as I was taught.
JoeKovalsky - June 12, 2014 at 11:02pm
visit: http://ios-unlocker.com/ this is FREE way to unlock iDevice ;-) for: -iPhone2g -iPhone3g -iPhone3gs -iPhone4 -iPhone4s -iPhone5 -iPhone5s iPhone with iOS 3.1.3 to 7.1.1
bob - June 9, 2014 at 2:42pm
Nope, still "searching". :(
iuhoosiers - June 11, 2014 at 12:51am
I get the same message... "Searching..."
Huy - June 6, 2014 at 12:54pm
Cam on ban rat nhieu
rosh72 - April 27, 2014 at 2:42pm
how to unlock iphone 4 32 gb ios 5.1.1 baseband 4.12.01 japansoft carrier
1335 More Comments
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