This method is only compatible with the Samsung Galaxy S2, with the model number GT-I9100 and running on XXLPJ firmware. You can check both your model number and your firmware version through “Settings > About Phone”. It’s important that your phone model and firmware matches the specifications above as attempting this rooting process on other phones may lead to bricking.
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- Samsung Galaxy S2 GT-I9100
- A Windows PC
- Make sure you’ve completely charged your Galaxy S2′s battery to prevent the phone from shutting off in the middle of the rooting process.
- Make a back up of any important data on your Galaxy S2 in case the rooting process may delete or corrupt information.
- Disable system utilities, security programs, antivirus software, firewall tools, and Samsung KIES on your PC.
- Check to see if you’ve got your USB Debugging enabled (Settings > Applications > Development > USB debugging).
- Install the proper device drivers for your Galaxy S2 on your computer.
- CF-Root kernel for the Galaxy S2 on XXLPJ firmware (CF-Root-SGS2_XX_OXA_LPJ-v5.3-CWM5.zip, 6.2 MB).
- Download both the CF-root kernel package and Odin3 to your computer. See the links above.
- Extract the contents of the CF-Root kernel package using 7-Zip, WinRAR or other similar file extraction software. You should get the CF-Root-SGS2_XX_OXA_LPJ-v5.3-CWM5.tar file after extraction. style=”font-weight: bold;”>Do not extract the TAR file further.
- Switch off your Galaxy S2.
- On your computer, double-click Odin3 to launch it.
- Boot your Galaxy S2 into Download Mode. You can do this by holding down the Volume Down button, the Home button, and the Power key.
- Connect your Galaxy S2 to your computer using a USB Cable
- In Odin3, in the lower left box you should see an “Added!” message. If you don’t get this message, there may be a problem with the drivers. Make sure that you’ve installed them and try again.
- In Odin3, click the PDA button and navigate to where you extracted the contents of the CF-root kernel.
- Select the CF-Root-SGS2_XX_OXA_LPJ-v5.3-CWM5.tar file.
- Do not touch any of Odin’s settings.
- Click the Start button in Odin3 to start flashing the file.
- If the file has been successfully flashed to your Galaxy S2, you should see the box on the upper leftmost corner of Odin3 light up in bright green with a PASS! message.
- If Odin3 gets stuck during the flashing process and doesn’t seem to be doing anything, or you get a FAIL message with a red background, try the following:
- Disconnect the Galaxy S2 from the computer.
- Close Odin3.
- Remove your Galaxy S2′s battery.
- Re-insert the battery.
- Repeat the procedure starting from step 3.
14. Your phone should restart automatically.
15. Once the Galaxy S2 logo comes up, you can disconnect your phone from your computer.
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