There has been a rooting method out for the Samsung Galaxy S5 smartphone for T-Mobile subscribers for a while now, but not for the Android 6.0 Marshmallow update. We anticipate that the Galaxy S5, which started out running KitKat will have the software brakes put on after Android 6.0 Marshmallow rolls out over the air, making it the last major update for the smartphone. The problems with Chainfire’s CF-Auto-Root tend to come about with the major updates and not the minor incremental updates we sometimes get. These larger updates usually require Chainfire to update the repo in a big way, and that can take some time since he usually rolls out the update for hundreds of devices on the same day after they are all prepared.

Knowing that, it could be quite a while before Chainfire gets around to releasing the CF-Auto-Root tool for the T-Mobile version of the Samsung Galaxy S5 smartphone so you’ll need to find another method. We have our hands on the traditional method of rooting and installing a custom recovery which will result in you have the permanent TWRP and the SuperSU installed, granting your root apps the permissions they need to run.

REQUIREMENTS

• You must follow our guide to installing a custom recovery image on the T-Mobile Samsung Galaxy S5 smartphone before you can use this guide and root using the SupeSU application.

BEFORE WE BEGIN

• Check that you still have the Developer Options unlocked and available from the Settings menu. Those who do not see it there after scrolling down the S5’s list can unlock it by tapping on the Settings app > About Device > Build Number continually until it says you are using your smartphone as a developer.
• Enter the Developer Options menu now by tapping on the Settings > Developer Options and then check the box so that the USB Debugging Mode is enabled.

HOW TO ROOT SAMSUNG GALAXY S5 SM-G900T T-MOBILE RUNNING ANDROID 6.0 MARSHMALLOW

1. Download the updated SuperSU that works like a charm for your T-Mobile S5 running Marshmallow from here.
2. Connect the T-Mobile Samsung Galaxy S5 to the computer with the USB cable and copy the SuperSU to the internal storage SD card. (You should keep it at the topmost level of the SD card folders and not tucked away in one of the subfolders, or else you will not find it once you get in your recovery later during the guide).
3. Unplug the T-Mo Galaxy S5 from the computer and shut it off completely by pressing the Power button and selecting the option to switch it off from the Power menu.
4. Reboot the T-Mo S5 by holding the hardware button combination to recovery mode and the custom recovery you have installed earlier will now boot up on the display. (The hardware key combination for recovery mode on your Samsung device is Power + Home + Volume Up. Try pressing them in a different order than the one you are using if you cannot seem to get recovery mode to boot up on your smartphone).
5. Tap the “Install” option and follow the prompts to install the SuperSU from theSD card.
6. Choose the option to reboot the system now once your SuperSU is flashed.

In conclusion, that’s how to root T-Mobile Samsung Galaxy S5 SM-G900T smartphones running Android 6.0 Marshmallow firmware by using a custom recovery and the SuperSU by Chainfire.