![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgr2Tmh65McswNdIGrKQWj21AE2E0wkveUysJiJJDhclUfk_CCGKMmMZ938ab4aV5MtctNTeLoArqbk2uWKvcLwbS8TERHRUy9dpKKPc1_waR4kVvlq5WL2E1fFRw7ax6LwmPJvDYKtZq0Q/s200/jailbreak.png)
It should be noted though that this release of Ultrasn0w is not a new unlock for iPhones with newer basebands, instead, it only fixes the compatibility issues on the existing devices, which are jailbroken (with preserved basebands: 01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00) on iOS 4.3.2 using PwnageTool 4.3.2 or Sn0wbreeze 2.6.
For iPhone 3GS Only: How to Update iPhone 3GS to 06.15.00 Baseband for Unlock:
Note: Updating iPhone 3GS baseband to iPad’s 06.15.00 might result in loss of GPS functionality.
Step 1: First up, you will have to jailbreak your iPhone 4 or 3GS on iOS 4.3.2 and preserve the old baseband using either PwnageTool on Mac, or Sn0wbreeze on Windows.
Step 2: Once you are done with the jailbreak, you can now unlock your iPhone on the supported basebands using Ultrasn0w 1.2.2 from Cydia. To do this:
- Start “Cydia” on your iPhone.
- Touch on “Manage” tab on the bottom.
- Now touch on “Sources” as seen in the screenshot below:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiIGe4DtcQEpiGDDOFr0yyMlN3dOCx0ZNIxXAlCB1nJwZ4XIpKiLcOCDTbeKQ21ize9kMRdH5TR-XaZAv-T48VYTPVdQcL3VgpEETXgRZSUJY-JyXol41ZDTnMmyss2tSW8DM-sRiWro824/s1600/4.2.1-Unlock.jpg)
- Touch on “Edit” and then on “Add”. You will be prompted to enter a url source as seen in the screenshot below. Type “http://repo666.ultrasn0w.com” and touch on“Add Source” to add this repo if you haven’t already.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhtsL81EMONE82GWcbuiT5dJdsazV0SbtVB6XuASK7C2WXSvBMj4YKu_NmDURdoYGTNKeI0FdZ8VhZC9O1oHZPsToJqJkvJ1DleHgNsdwIHmFdqTCWAalI1vwebh9g6yQ03AYFdWpesU3Cl/s1600/4.2.1-Unlock-1.jpg)
Cydia will now automatically update your sources by following a series of automated steps.
- After installation is completed. Search for “ultrasn0w 1.2.2” in Cydia and install this application. This app will automatically unlock your iPhone so that you can use it with any carrier.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4_L8_vNPdBv5MNkUjR9u7rIZAkWCgKOpR98fVB9MnbfKv6vQeTPOQ0dckJbEQDUNKcAA-gD_cRM8dS6V9Lmmzd3eGvUOutEY7jY6QnOfrMcoHmwQw5VIoTGvm7gC1CqPGr97HYNQcBvL-/s1600/Ultrasn0w-1.2.2.jpg)
Step 3: Now simply restart your iPhone and voila! you should now have a fully unlocked iPhone 4 or 3GS, running iOS 4.3.2 !
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