Tips & Tutorials

How to Root Galaxy S2 I9100 on Android 4.1 Jelly Bean

Android 4.1 for Samsung Galaxy S2 has just been out on the Internet and thanks to a few developers, we now already have root available for the Galaxy S II. You can now easily root Galaxy S2 on Android 4.1 Jelly Bean for full file access and be able to install / use root apps. Android 4.1 is available for: Samsung Galaxy S II, Samsung Galaxy S III, Samsung Galaxy Nexus and HTC One X.

Custom ROMs usually are fully rooted and you don’t have to go through all these steps to root your phone again after a custom ROM installation, but this Galaxy S2 Android 4.1 is a port from the Galaxy Nexus official firmware update. So since you know all stock firmware come un-rooted and clean, you will have to root Android 4.1 on Galaxy S2 I9100.

Galaxy S2

Disclaimer: All the tools, mods or ROMs mentioned below belong to their respective owners/developers. We ( or the developers are not to be held responsible if you damage or brick your device. We don’t have you on gun point to try out this tutorial 😉

Make sure you have installed all your USB drivers for the Samsung Galaxy S II to connect it with the computer. Download Samsung Galaxy S II USB drivers! Apart from just the USB drivers, there are a few more things that you need to take care of.

1. You need to enable USB debugging mode. This helps to connect your Android phone with the PC. See here: How to Enable USB Debugging.

2. Your phone battery should be 80-85% charged. If your phone goes off suddenly because of battery, during flashing ROMs or installing mods and updates — your phone might go dead permanently. See here: How to Check Battery Percentage.

3. Backup all your important data that you might need as soon as your flash a new ROM, or make a backup for just in case, you never know when anything might go wrong. See below on how to backup data:

4. Your Samsung Galaxy S II should be factory unlocked. Additional instructions for locked Android devices will be added in the tutorial for unlocking devices.

Now, let’s proceed with the tutorial and root Android 4.1 Jelly Bean on your Galaxy S2 I9100.

HOW TO: Root Android 4.1 on Galaxy S2 I9100

We have put together a detailed step-by-step instructions guide on how to root Android 4.1 on Samsung Galaxy S2. If you are used to installing custom ROMs on your Samsung Galaxy S2, then this should not be any different for you. However, for beginners, you need to flash a custom recovery using ADB on your phone like ClockworkMod. Please Google that up if you are unsure.

To Remember:

  • This tutorial is only for rooting Android 4.1 (stock) on Samsung Galaxy S2 I9100. Please do not try on any other Galaxy S2 variants.
  • ClockworkMod recovery should be installed from before.
  • Make sure you backup all your data in your phone before proceeding.

Complete Step-By-Step Instructions:

Step 1 – Download for Galaxy S2 to your computer.

Step 2 – Connect and mount your Galaxy S2 USB memory on your computer using the USB cable.

Step 3 – Now copy/paste the downloaded file to your SD card. Make sure the file is in the SD card root (not in any folder).

Step 4 – Then turn off your phone and disconnect from the USB cable.

Step 5 – Now to get in the recovery mode. Switch on the phone while pressing and holding the Menu + Power buttons.

Step 6 – Assuming you have ClockworkMod recovery, perform a full data wipe first. Then scroll down to “flash zip from SD card” and press the power button to select it.

Step 7 – Press the power button again and select “choose zip from sdcard”.

Step 8 –Now using your volume keys, navigate to the file that you copied to your SD card and select it using the power button. Confirm the installation on the next screen and the installation procedure should start now.

Step 9 – After the installation completes, go to “+++++Go Back” and reboot the phone by selecting “reboot system now” from the recovery menu. The phone will boot now and it might take about 5 minutes to boot on your first time. So, please wait.

That’s it! Your Galaxy S2 is now rooted on Android 4.1. Check for Superuser app in your apps list for verification.

To make sure you have correctly installed the above root method and it’s working, verify with Root Checker as given in the link.

Have fun playing with it! If you have any issues, please fire them up in the comments below!