How To Install CM11 Android 4.4 Kit-Kat Beta On T-Mobile Samsung Galaxy S3 T999.


One of the fine decisions is to purchase mobile devices from Carriers, since they provide you with low cost and best part is the installments, you can buy a high-end device with maximum installments of 24-months and most of them are provide the update of the mobile phone, means that if you give your old phone back , pay the extra money and you will receive the brand new successor of your old set and you won’t have any problem updating the software either.


In this Article,we will show you How To Install CM11 Android 4.4 Kit-Kat Beta On T-Mobile Samsung Galaxy S3 T999But before we begin, Make sure that you have battery charged over 60 % and have backed up all your important ContactsCall Logs & Messages.It is highly recommended in case of any mishap or data loss to back up all your important data.


The methods involved in flashing custom roms and rooting your phone is highly custom and may result in bricking your device, and has nothing to do with Google or the device manufacturers which is Samsung in our case. In case of any mishap we may not be held responsible. Follow these instructions to the letter to avoid any mishap or bricking. Make sure that whatever you do, you are doing it at your own responsibility.

Important things:

  • Your Device must be Rooted and CWM Recovery must be installed on it. 
  • Enable USB debugging mode.
  • Make sure that battery level is at 85% or more.
  • This Tutorial is Only For T-Mobile Samsung Galaxy S3 T999.

How To Install CM11 Android 4.4 Kit-Kat Beta On T-Mobile Samsung Galaxy S3 T999.


  1. Download CM11 Android 4.4 ROM and Google Apps for Galaxy S3 to your computer.
  2. Connect Galaxy S3 T999to PC. Make sure to use original USB cable. Download Samsung USB Drivers.
  3. Copy and Paste the downloaded files to the root of your sd card.
  4. Disconnect the cable.
  5. Turn off your tablet.
  6. Now go to Recovery mode, Press and hold Power + Volume Up + Home Buttons till you see some text on-screen.
  7. From Recovery, First Choose ‘Wipe Cache’.
  8. Then Navigate to ‘advance’ and choose ‘Devlik Wipe Cache’ so you won’t get in any bootloop.
  9. Then finally select ‘Wipe Data/Factory Reset’.
  10. Navigate to ‘Install zip from sd card’ then select ‘choose zip from sd card’.
  11. Select the Android 4.4 file and confirm the installation on next screen.
  12. Wait for the process to over, then select ‘reboot system now’.

Note: Repeat Step 10 and 11, but select Gapps instead of Android 4.3, to install Google Apps.

Voila! your Samsung Galaxy S3 T999 has been updated to Android 4.4 Kit-Kat CM11 Beta Custom Firmware , Wait for at least 5-minutes for the first run.

Got a question/query or a suggestion? Drop it below.