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blackra1n RC3 is by far the fastest and the most complete jailbreaking and unlocking tool for iPhone running on the latest iPhone 3.1.2 firmware. The latest RC3 version includes blacksn0w which can unlock iPhone 3G and iPhone 3GS running 05.11.07 baseband. When iPhone 3.1.x firmware was released, Apple patched the exploit that allowed iPhone users to unlock iPhone’s. As a result, many users who upgraded to the latest firmware were left locked out with 05.11.07 baseband until geohot came to the rescue. Follow the simple step-by-step guide below to jailbreak all iPhone’s (2G/3G/3GS) and iPod touches (1G/2G/3G) on firmware 3.1.2.

blackra1n RC3

Note for iPhone 3G and 3GS Unlockers: If you are looking for iPhone 3.1.2 firmware unlock on 05.11.07 baseband then take a look at the step-by-step guide posted here.

Step 1: Download and install the latest version of iTunes if you haven’t already. (download link given below).

Step 2: You will now need to first update/restore to the original iPhone OS firmware 3.1.2 on your iPhone by using the latest version of iTunes. Download link for iPhone Firmware 3.1.2 is given at the end of the post.

iPhone OS Firmware 3.1.2

Step 3: Download blackra1n RC3 for Windows or Mac (download link at the end of the post).

Step 4: Start blackra1n app. If you are running it on Windows 7 or Vista, run the app with “Windows XP Compatibility” mode by enabling it from the “Properties” tab to avoid any errors during the jailbreak process.

Step 5: Click on “make it ra1n”:blackra1n RC3

Step 6: Let the app do its thing and wait for the phone to automatically reboot.

Step 7: You should now have “blackra1n” in the list of applications on your iPhone. Run “blackra1n” app and select the packages you want to install like “Cydia”. This will jailbreak your iPhone or iPod touch on iPhone 3.1.2 firmware.

Step 8: Finally reboot your iPhone. Voila! You should now have fully jailbroken iPhone or iPod touch running on firmware 3.1.2.

Unlock iPhone 3.1.2 firmware 05.11.07 Baseband: Follow the step-by-step guide posted here to unlock your iPhone 3G and 3GS on 3.1.2 firmware with 05.11.07 baseband.

UPDATE 1: Those of you who are having issues with WiFi after jailbreaking and unlocking with blackra1n RC3 (with blacksn0w) should reset network settings by navigating to Settings –> General –> Reset –> Reset Network Settings and then reboot the iPhone.

UPDATE 2: Follow the steps posted here to fix WiFi, Youtube and GPS Problem caused by blacksn0w on iPhone 3.1.2 Firmware.

UPDATE 3: Follow the step by step guide posted here to Enable Internet Tethering on Unlocked iPhone 3.1.2 Firmware with blacksn0w.

UPDATE 4: iPhone 3.1.3 firmware has been released and can be downloaded from here. iPhone 2G and iPod touch 1G/2G(older models) can be jailbroken and unlocked(iPhone 2G only) on the latest iPhone 3.1.3 firmware. Follow the step by step guide posted here or here to jailbreak/unlock iPhone 2G, and here for iPod touch 1G/2G on 3.1.3 firmware.

UPDATE 5: Redsn0w 0.9.4 is LIVE! Download links and jailbreaking instructions can be found here.

UPDATE 6: PwnageTool 3.1.5 for Mac OS X is now LIVE! Follow our complete step by step guide posted here to jailbreak and unlock iPhone 2G, 3G, 3GS and iPod touch 1G, 2G on iPhone OS 3.1.3.

You can follow me on twitter or join our facebook fanpage to keep yourself updated on all the latest iPhone jailbreaking and unlocking releases.

Feel free to ask me any questions here should you run into any problems when unlocking your iPhone with blacksn0w.

Download iTunes 9.0.2 for Windows and Mac
Download iPhone 3.1.2 firmware
Download blackra1n RC3

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