Step by Step iPhone unlocking Guide using utltrasn0w

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Here we are giving detailed step by step instructions on how to unlock your iPhone using ultrasn0w. It doesn’t matter if it’s an iPhone 3G/3GS or 4G, process is the same for all the models. We have included sufficient pictures along-with the instructions so that you don’t have any confusion in the process.

Your iPhone must already be jailbroken before you start unlocking procedure. Refer to this jailbreaking guide for jailbreak instructions.

At present ultrasn0w supports 04.26.08, 05.11.07, 05.12.01, 05.13.04 and 06.15.00 baseband (modem firmware) versions for iPhone 3G and 3GS. If your iPhone 3G/3GS is at a higher baseband version like 05.14.02, 05.15.04, 05.16.01, 05.16.02 or 05.16.05, you need to update your baseband version to 06.15.00 (iPad baseband) to use ultrasn0w unlock. Please be aware that if you upgrade to iPad baseband, your iPhone’s GPS will get affected, however, now there is method to bring your baseband back to unlockable baseband version of 05.13.04 from baseband 06.15.00 using redsn0w. Thanks to Musclenerd of iPhone-dev team for figuring this out and share with all of us.

If you are trying to unlock an iPhone 4 with ultrasn0w, it must be on baseband (modem firmware) 01.59. If you are at higher baseband version, you’ll have to unclock your iPhone 4 using gevey sim except baseband 04.11.08 or 04.12.01 for which unfortunately there is not free unlock available as of now.

To know your current baseband version follow this guide.

Step One

Better to turn off 3G before you start the procedure.

Tap on “Cydia” from your springboard. Once Cydia opens and loads, tap on “Manage” tab in the bottom of the screen.

Step Two

Tap on “Source” and look for the ultrasn0w repo ( in the next screen, if it’s not there already, press on edit button on the top right of the screen else skip to step 5

Step Three

Tap at “Add” button on the top left of the screen, enter as the source url and tap on the “Add Source” button. Please note the “0” in ultrasn0w’s spelling, it’s not the letter “o” but the digit “0”.

Step Four

Once the source has been added, tap on “Return to Cydia” button on the bottom of the screen and tap on “Done” button at the top right corner of the screen.

Step Five

Select repo666.ultrasn0w from the list of source entered by User and tap on ultrasn0w from the list of packages.

Step Six

Press the “Install” button at top right of the screen and then tap on “Confirm” button at top right of the screen.

Step Seven

Once the installation completes successfully, tap on “Restart SpringBoard” button at the bottom of the screen. You phone will restart and now you can insert any sim of your choice the get the network.