How to root the Samsung Galaxy S2 I9100G on Android 4.1.2 Jelly Bean | Easiest Way

Rooted on 14 August 2013.

This is the easiest way to root your Samsung S2 phone. It just requires one download, and you don't root it via the USB connection technically.

This works for S2 I9100G only and may not work for other Samsung s2 variants.
Other warnings regarding rooting a phone apply here as well, such as related to warranty, bricking your phone. These steps worked for me, but may not work for you. So don't blame me if you make a mistake somewhere.


Check list
1) Install the appropriate USB Driver for Samsung GalaxyS2 on the computer. Basically if you can connect your phone to your computer to browser the files, then you are done.
2) Ensure that USB Debugging Mode is enabled. [Press Menu>> Settings>> Applications. From there navigate and click on Development option and ensure the USB Debugging Mode is turned on.]   
3) Create back-up for all the data of the phone.  This is important. You don't want all your contacts to disappear. Use the program Samsung Kies to automate the backup/restore procedures.


Procedure to root the Samsung Galaxy S2 I9100G working on Android 4.1.2 Jelly Bean

1) Download Rooting package [File name: SU-BB-Installer.Zip] for Galaxy S2 I9100G to the computer. Let me know if the file is no longer there.
2) Connect the phone to the computer using USB cable and copy the downloaded zip file to the external SD card of the phone. It may come up as "Card" in your device under "Computer".
3) Unplug the USB cable from the Galaxy S2 and turn it off
4) Boot the phone into Recovery Mode. Press and hold Volume Up + Home + Power buttons together. Release the Home button first then the Volume Up until the Samsung logo appears. Now release the Power button.. Try other combinations of releasing and pressing if this doesnt work.
5) Using the Volume buttons scroll down to 'apply update from external storage,' select it by pressing the Power button. Then locate the SU-BB-Installer.zip file which is saved on the SD card. Select it using the Power button and confirm installation. The process took about a minute for me.
6) Once the installation is completed, return to the recovery menu and reboot the phone by selecting 'reboot system now'



Actual Source: http://www.ibtimes.co.uk/articles/445625/20130313/galaxys2-i9100g-root-android412-jellybean-install-clockworkmod.htm
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