Latest Android 6.0.1 Marshmallow Custom update is now available for the users of T-Mobile Galaxy S5 SM-G900T model. This is AICP 11.0 custom ROM which will allow you to update the device to latest Android 6.0.1 Marshmallow. You can download the update custom ROM file from the link given in the description and then flash it using TWRP or CWM custom recovery.Galaxy-S5 Neo G903F

So, first you need to have Root access on your device and also have custom recovery installed on it to successfully flash this custom ROM. So, now let us move forward and learn about how you can flash this ROM on your device. Make sure as this is a custom ROM which is still in its initial stage of development so it might have some bugs. So, it is advisable that you back up your data and make Nandroid back up of current ROM so that you can restore it if some thing goes wrong.

Preparing your Phone

  • This instructions are strictly for T-Mobile Galaxy S5 SM-G900T, so do not try it on any other device or you may brick your device.
  • Device should be fully charged up to 100%.
  • Install Galaxy S5 USB drivers on your computer.
  • Back up all the required data to some safe storage.
  • Make a Nandroid back up of the current ROM so that you can restore it when required.
  • Make sure the device bootloader is unlocked.
  • Root your device and install custom recovery on it if not done already.
  • Enable USB debugging mode of your device. Go to Settings > Developer options > USB debugging mode.USB Debugging

Download and Install AICP Custom ROM

  1. Download Android 6.0.1 Marshmallow based AICP custom ROM from here.
  2. Download the Google App's for Android Marshmallow from here.
  3. Connect the device to computer and transfer the ROM file and Google App's file to your device storage.
  4. Disconnect the device and turn it off completely.
  5. Reboot the device into recovery mode, press and hold Volume Down + Home + Power key for few seconds.
  6. When in recovery mode tap on Wipe tab and select all the options given under it.
  7. Now, confirm the wipe action by swiping the button at the bottom of the screen.
  8. Now, return to main menu and tap on Install tab.
  9. Locate the ROM file stored on you device and select it.
  10. Swipe the button at the bottom to flash the ROM file on your device.
  11. In the same way flash the Google App's on your device.
  12. Return to main menu and tap on Reboot.
  13. System will now reboot in normal mode.
  14. That's all you can now check the device Android version in Settings > About Device > Android Version.