We’re sure you flashed the latest Android 4.0.3 XXLP2 firmware on your Galaxy S2. XXLP2 is the latest Ice Cream Sandwich firmware available for Galaxy S2, and it’s better than earlier leaks. If you’re holding on for a better leak, you can try XXLP2.

Moreover, even root kernel from Chainfire is available now. So you can root it using the latest CF-Root kernel, specifically for XXLP2. Read on to find out how. And btw, this will also install Clockworkmod recovery, CWM, on your Galaxy S2, which is what you will need to flash roms, mods, other hacks, or revert back to your old CWM backup of Gingerbread/ICS firmware/rom.

Use this only on Galaxy S2 running XXLP2 firmware.

Compatibility

This rom and the guide below is compatible only and only with Galaxy S2, model number i9100. It’s not compatible with any other device. Check your device’s model number in: Settings » About phone.

Warning!

The methods and procedures discussed here are considered risky and you should not attempt anything if you don’t know completely what it is. If any damage occurs to you or your device, we won’t be held liable — you only will be responsible, you’ve been warned!!!

Step by Step Instructions to Root XXLP2:

  1. Download CF-Root kernel first. File name – CF-Root-SGS2_XX_OXA_LP2-v5.2-CWM5.zip. Size 6.14 MB. Once again, be sure to use this only on Galaxy S2 i9100 phone with XXLP2 firmware installed. Not otherwise.

  1. Unzip the above file once. You will get the .tar file – CF-Root-SGS2_XX_OXA_LP2-v5.2-CWM5.tar. DO NOT extract the .tar file (this might show up as a zip file as well, but do not extract it). You need to flash the .tar file using Odin to gain root access and install the ClockWorkMod Recovery (CWM) alongside. (If you’re getting zImage, it means you’ve extracted the .tar file too! — and that’s not a right thing to do. Use 7-zip (free software) to extract.)

  1. Download Odin3 v1.83. Filename: Odin3-v1.83.exe. Size: 416 KB. Run this file when asked in step 6 below.

  1. Switch off your phone. Wait for vibration to confirm complete switch off.

  2. Now, put the Galaxy S2 in Download Mode — press and hold these keys together: Volume Down + Home + Power. On next screen, press Volume Up to continue to download mode. This is required to flash any kernel on the phone.

  3. Open Odin now by double clicking on Odin3 v1.83.exe file you got in step 3.

  4. Connect your phone to PC now. You should get the message “Added! !” under Odin’s message box in the bottom left (Check screenshot after step 9). If you don’t get this message, then probably there is a problem with drivers. Make sure you’ve the drivers installed.

  5. On Odin, click the PDA tab and select the .tar file you got in step 2 — CF-Root-SGS2_XX_OXA_LP2-v5.2-CWM5.tar (as shown in screenshot after step 9)

  6. Double check step 7 and step 8. Your Odin’s screen should look like this (screenshot below):

  1. Click the Start button on Odin to flash the CF-Root kernel (after double checking the ODIN screen). After flashing is complete, you’ll get a PASS message (with green background).

    IMPORTANT Note: If ODIN gets stuck and doesn’t seem to be doing anything, or you get a FAIL message (with red background) in ODIN, do the following:

    Disconnect the phone from the PC, close ODIN, remove battery, re-insert it, turn phone on in Download mode again, and do the procedure again from Step 5.

  2. After CF-Root is installed, phone will restart automatically. When the Galaxy S2 logo shows up on phone, you can disconnect the cable from phone.

  1. Your phone is rooted now. The superuser app is included which allows you to give root access to applications. Also, CWM based recovery has been automatically installed too. Use the CWM app in app drawer to boot into recovery and do rom backups and restore. Happy flashing!

That’s it. You’ve now got a rooted XXLP2 firmware. Thanks to Chainfire as always, for his quick CF-Root updates.

Add your comments to the Comments section below if you have any problems.