These are instructions on how to root Samsung Galaxy S2 4G I9210T (running on android 4.0.4) using TowelRoot App.

Requirements: Your Samsung Galaxy S2 4G I9210T should have at least 10-20 percent of battery to perform the rooting process.

Root Samsung Galaxy S2 4G I9210T using the TowelRoot App

  1. Enable installation of 3 party Apps on your Samsung Galaxy S2 4G I9210T. To Enable, Open Settings > Security > Device Administration > Unknown Sources > Tap on the Checkbox to enable it.
    2. Android Unknown Sources
  2. Download and install TowelRoot Application on your Samsung I9210T. Once installation is completed you will be able to see the TowelRoot Icon in the App Menu.
    3. Towelroot App
  3. Now, Tap on the TowelRoot App Icon to Open it.
    4. Towelroot App Drawer
  4. Once TowelRoot Application is launched, you will be able to see the following screen on your Device:
    5. Towelroot Launched
  5. Tap on the Make it Rain button to root the device.
    6. Towelroot Make It Rain
  6. Now, you will be able to see the TowelRoot success Message on the Samsung I9210T Screen.
    7. Towelroot Success
  7. Your Samsung Galaxy S2 I9210T is Rooted. To check whether your phone is rooted correctly, open App Drawer, you will be able to see a new app installed, called SuperSU. If this app exists, then it means you have successfully rooted the device.
    8. Towelroot Supersu

    Optional: You can also verify the root status of your device by using the Root Checker App.

Notes

[*] No data loss process: Your device Data like contacts, pictures, videos, music and etc will be not affected with the above method.

[*] Device Warranty: Once you have fully unrooted the device through SuperSU, you can claim for the device warranty.

[*] How to unroot: To unroot, Open SuperSU App > Settings > Tap on Full Unroot.

[*] Samsung Stock Firmware: If you are looking for the original firmware for your device, then head over to Download Samsung Stock Firmware page.

[*] Samsung USB Driver: If you are looking for the original USB Driver for your device, then head over to Download Samsung USB Driver page.

[*] Credits: TowelRoot App is created and distributed by GeoHot (XDA Developer). So, full credit goes to him for sharing the App for free.