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

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

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

Step Two
Press to select the Manage tab at the bottom of the screen.
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Three
Press to select the large Sources button
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

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

Step Five
Press the Add button at the top left of the screen.
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Six
Enter http://repo666.ultrasn0w.com/ as the source url and press the Add Source button.
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Seven
Once the source has been added press the large Return to Cydia button.
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Eight
Press the Done button at the top right of the screen.
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Nine
Press to select repo666.ultrasn0w.com from the list of user entered sources.
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Ten
Press to select ultrasn0w from the list of packages
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Eleven
Press the Install button at the top right of the screen.
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Twelve
Press the Confirm button at the top right of the screen.
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Thirteen
After installation completes successfully press the large Restart Springboard button.
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

Step Fourteen
You should now be able to insert the SIM of your choice!
How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0wHow to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

***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.
Dragec - March 28, 2016 at 3:56am
I finally made it on an iPhone 3G, 4.2.1, 5.15.04!!! Thanx for the tutorials, although they contain only bits of information, and if you get stuck anywhere you'll have to google further. To succeed, I used redsn0w v. 0.9.14b2, not the latest one (the latest one will give you faulty baseband after downgrade with no wi-fi, bluetooth or IMEI, and you will have to start all over again). After upgrading the baseband to 6.15.00, I got stuck on apple logo (bricked phone). To bypass this, you need to download, and Select IPSW iOS 4.1 (not 4.2.1), and use "Just boot" option. After the phone boots, it will be buggy (the screen), but it will become alive again. Check if the baseband is 6.15.00. If yes, proceed to Jailbreak in redsn0w (this time using 4.2.1 IPSW), and tick the boxes Install Cydia, and Downgrade baseband. After it is done, you will have an iPhone with baseband 5.13.04, which you can unlock with ultrasn0w, but (most probably) with "No service" bug. To resolve this, follow the tutorial concerning this matter, and voila! iPhone unlocked. This procedure felt like walking through thick bushes...
H1uam - October 27, 2014 at 5:18pm
Great instructions, best I had found as others I tried took me hours and did not work. Many thanks
jaykay - October 20, 2014 at 1:55am
how to unlock you iPhone just go on your iCloud account on a computer go to finder click devices click the device logged in to your iCloud click listed then put new pass code then got to your iPhone put in new pass code. your phone will ask for iCloud or apple id then put the pass code in that then the iPhone will be unlocked
ribas - July 9, 2014 at 9:05pm
nao funcionou, fiz como foi ensinado. did not work, as I was taught.
bob - June 9, 2014 at 2:42pm
Nope, still "searching". :(
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