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Update Galaxy S3 to Android 4.4.2 Kitkat Firmware – Guide

Do you have T-Mobile / Verizon / U.S. Cellular Samsung Galaxy S3 and want to upgrade it to Android 4.4.2 Kitkat then you can now do it by following the below listed steps. Thought he official release of Android 4.4.2 Kitkat for your devices are not yet confirmed you can try the below listed Custom ROM to taste the latest Android 4.4.2 Kitkat on your device.

Before proceeding to update your device to Android 4.4.2 Kitkat using the Custom ROM, let’s have a quick look at some of the pre-requisites listed below.


  • Backup all of your data to safe location, to avoid any data loss while updating your device to Android 4.4.2 Kitkat firmware.
  • Enable USB Debugging on your device from the path “Settings > Applications > USB Debugging”.
  • Charge your device to at least 75%, to avoid bricking of your device while updating it to Android 4.4.2 Kitkat.
  • Make sure your device is rooted as we are going to install the Custom ROM, which requires rooted device to install.

Assuming that you have done with all the above steps, now let’s continue to update your device to Android 4.4.2 Kitkat.

Disclaimer: we should not be held liable or responsible for any damage occurred to your device. Proceed at your own risk.

Procedure to Update T-Mobile / Verizon / U.S. Cellular Samsung Galaxy S3 with Android 4.4.2 kitkat Custom ROM:

  • Download  the Google Apps Package and the corresponding firmware package for your device to your PC.

[box type=”download” align=”aligncenter” ]

i. International GT-I9300.

ii. T-Mobile SGH T999.

iii. U.S. Cellular GT-I9308.

iv. Verizon SCH-I535.


  • After downloading both the files copy them on your device’s SD card, make sure to copy on the root of your SD card not inside any folder.
  • Disconnect your device from PC and install ROM Manager app from Google Play store and install Custom Recovery in your Galaxy S3.
  • Now enter into Recovery Mode using ROM Manager. Alternatively you can also use manual method to enter into Recovery Mode, by Power off your device and press “Volume Up + Home + Power Button” Simultaneously.
  • In the Recovery Mode Wipe your data and Cache by using the appropriate options.
  • Now select Install Zip from SD card and select the firmware package and install it.
  • Now again select Install zip from SD card and install Google Apps Package.
  • Now go back and select reboot system now and reboot your phone. Now let your device reboot successfully and wait until it boots successfully.
  • Now check the Android version from the “Settings > About Phone”, you will see the Android version as Android 4.4.2 Kitkat.