Some people like to say that rooting with Chainfire’s CF-Auto-Root tool is the beginner way of rooting a Samsung smartphone. If you are one of these people, then you will be pleased to know that there isn’t a version of the CF-Auto-Root that is currently capable of rooting the T-Mobile Samsung Galaxy Note 4 smartphone when it is running on the Android 6.0.1 Marshmallow software updates. US phone carrier specific models of smartphones can often cause havoc within the rooting community as companies like to lock in their system apps, so you have to use them–or at least have to keep them on there, so they take up additional memory.
One sure fire way to break out of those shackles is if you find that a custom recovery image is available to be installed. With a custom recovery, we can flash the SuperSU on just about anything as the installation directly from the custom recovery partition handles everything very easily in comparison to what a one-click rooting tool needs to accomplish to get the job done with your stock recovery partition still intact.
- You must have a custom recovery installed on the Samsung Galaxy Note 4 SM-N910T smartphone  before you can follow this guide to root the device.
BEFORE WE BEGIN
- You should back up the data on the Note 4 smartphone before proceeding to root it with the SuperSU. Though installing and enabling the SuperSU does not usually result in data loss, it is always recommended that you take a few minutes to backup the data just in case something goes wrong, and you want to apply a hard reset later.
HOW TO ROOT SAMSUNG GALAXY NOTE 4 SM-N910T RUNNING ON ANDROID 6.0.1 MARSHMALLOW SOFTWARE UPDATES
- Download the SuperSU  on the computer and it ends up in the downloads folder if you are using Windows.
- Connect the Samsung Galaxy Note 4 SM-N910T smartphone to the computer with the USB cable that you usually us to charge the battery.
- Open the folder where you have the SuperSU and copy it over to the internal SD card storage folder for the Note 4 smartphone.
- Unplug the Samsung Galaxy Note 4 smartphone from the computer once you are satisfied that you have the SuperSU on the internal storage SD card.
- Boot the Samsung Galaxy Note 4 smartphone into the recovery mode by pressing the hardware button combination for that mode.
- Tap on the Install button from the main TWRP menu and then browse through to the SD card and choose to upload the SuperSU file.
- Swipe across the button of the display where it tells you to swipe to install that SuperSU file.
- Choose the ‘Reboot’ option from the menu and then the ‘System’ option.
In conclusion, that is how to root Samsung Galaxy Note 4 SM-N910T smartphones running on the Android 6.0.1 Marshmallow software updates by flashing the SuperSU by Chainfire from a custom recovery image. You find that installing the SuperSU from the custom recovery results in it being enabled correctly unlike if you were just to download it from the Google Play Store.