Samsung recently started rolling out its official Android 4.1.2 Jelly Bean firmware update for the Samsung Galaxy S2 bearing model number GT-I9100 in several countries. The new official firmware is now available for download through Samsung KIES as well as Over-The-Air (OTA) update.

Samsung Galaxy S2 I9100 users who have already updated their devices with Android 4.1.2 Jelly Bean, may root their devices using the tutorial below.

Disclaimer: Rooting voids the warranty of your device. We and the developer of this rooting procedures shall not be held responsible if any undesirable outcomes may happen to your device. use of this root guide is solely at your own risk!

Pre-requisites
1) Install USB Driver for Samsung Galaxy S2 on the computer.
2) Enable USB Debugging Mode on the phone.
3) Make a backup of all your important data before following the guide.
4) The Galaxy S2 should be factory unlocked and not locked to any particular carrier.
5) Ensure the battery of the phone is charged more than 80 per cent.
6) The Root Kernel file works only on Samsung Galaxy S2 I9100 running on Android 4.1.2 Jelly Bean firmware. Applying this on any incorrect variant will brick the device. Verify the model number of the Galaxy S2 by navigating to Settings >> About Phone.

File Required
1. Root Kernel for Galaxy S2 I9100: Siyah-s2-v6.0b4.tar or Siyah-s2-v6.0b5.tar
2. Odin 3.07

Steps to Root Galaxy S2 I9100 Running on Android 4.1.2 Jelly Bean Firmware
Step 1: Extract Odin 3.07 file using winrar/7zip/winzip or any other extracting tool.
Step 2: Switch off the Galaxy S2. Then boot the device into Download Mode by pressing and holding Volume Down + Home buttons together and then press the Power button until the device turns on. Now press the Volume Up button to enter Download Mode.
Step 3: Launch Odin on the computer.
Step 4: Connect the Galaxy S2 to the computer using USB cable while it is in the Download Mode. Wait until Odin detects the device. When the device is connected successfully, the ID: COM box will turn yellow with the COM port number. Additionally, the successful connected will be indicated by a message saying Added. If Odin fails to detect the device then re-install USB driver.
Step 5: In Odin, click the PDA button and select the Root Kernel file.
Step 6: Verify that Auto Reboot and F.Reset Time checkboxes are selected in Odin. Also, ensure the Re-Partition option in Odin is not selected.
Step 7: Double-check and click Start in Odin. The installation process will now begin.
Step 8: Once flashing completed, your phone will restart and soon you will see a PASS message with green background in the left-most box at the very top of the Odin. You can now unplug the USB cable to disconnect your device from computer.

Samsung Galaxy S2 I9100 running on Android 4.1.2 Jelly Bean firmware is now rooted successfully. You may now install any app that requires root permission.

Thanks to all fellas at XDA who first tried out this rooting technique. This root method was originally posted via XDA-Developers.

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Cara meng-install Google Play v.4.1.10 APK

Langkah 1: Download file APK Google PLAY Store v4.1.10 dari link berikut ini dan simpan. Untuk lebih mudahnya, download langsung dari handphone atau tablet anda. dan jangan merubah nama file-nya.

Step 1: Download the Google PLAY Store v4.1.10 APK file from this link then save to your computer. To make things much easier, you can directly download the file on your Android tablet or smartphone. Do not rename the file and leave it as it is.

Langkah 2: Setelah Download file APK Google PLAY Store v4.1.10 selesai, colok-kan perangkat ke komputer dengan kabel usb. Biasanya termasuk dalam paket pembelian.

Step 2: After you have downloaded and saved the file on your computer, connect your device to your computer using a USB data cable. This is the cable that you got from the time that you’ve purchased your tablet or phone.

Langkah 3: Yang harus ada lakukan sekarang adalah meng-kopi file ke folder sdcard atau memori eksternal prangkat anda.

Step 3: Now, the next thing that you must do is copy the file from your computer then save to the root directory of your device. It would be best if you save the APK file on your phone’s SD card.

Langkah 4: Buka menu > Setting > Aplikasi. Centang opsi Sumber tak dikenal agar ponsel/tablet mengizinkan kita untuk meng-instal aplikasi dari sumber selain Play store-nya google.

Step 4: Go to Settings > Applications. Check the box for ‘Unknown Sources’ to allow your phone to install files that weren’t downloaded from the Google PLAY Store.

Langkah 5: Buka File Manager atau File Explorer, cari file ‘com.android.vending-4.1.10.apk’ yang sudah anda kopi tadi.

Step 5: Launch your device’s File Manager (also known as File Explorer) then locate the APK file that you have downloaded and copied to your tablet or smartphone. Better yet, search and select the file called ‘com.android.vending-4.1.10.apk’.

Langkah 6: Untuk meng-install, buka file dan pilih Terima. Ikuti petunjuk yang di tampilkan. Jika sudah selesai, Google Play Store sudah ter-update

Step 6: To install the file, tap on the ‘Accept’ button. Follow the on-screen instructions for the Google PLAY Store app to be updated to its latest version.

Sekarang anda bisa men-cek apakah sudah ter-update atau belum dengan membuka aplikasi Google Play Store dan membuka bagian Setting. Scroll ke bawah sampai anda menemukan menu Tentang lihat apakah sudah menjadi 4.1.10.

That’s it! If you do want to make sure that your app’s version has been successfully updated to v4.1.10, you can check by launching your app. Click on the Menu key to go to Settings then scroll until you see your app’s ‘About’ section. Check the Build Version and see if it’s on 4.1.10. You can also check the new features.

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