These are the instructions to root Samsung Galaxy S6 SM-G920P running on the Android 5.1.1 update.

REQUIREMENTS

• You must have the Samsung Galaxy S6 with the model number SM-G920P to follow this guide. Any Galaxy S6 with a different model number will likely get bricked by following this guide. The SM-G920P is the Sprint variant and you can check your model number by tapping on the Menu > Settings > About Device > Model Number.
• The CF-Auto-Root file found in this guide is based on Android 5.1.1 Lollipop and comes with the LMY47X.G920PVPU3BOJ7 build ID. It doesn’t mean you need to be running that build number; however, you should use the ID as an indicator since some Samsung devices will not boot older images.

BEFORE WE BEGIN

• Download the Samsung USB Drivers for the Windows computer you plan on using during the guide. You need those same drivers running before you start the steps otherwise you run the risk of the guide not working for you and your Samsung Galaxy S6 smartphone.
• You might need to unlock the the Developer Options menu if it is hidden from the Settings. You do that by tapping on the Menu > Settings > About Device > Build Number 7 times.
• You will need to enable the USB Debugging Mode so you can connect the Samsung Galaxy S6 to the computer. You can get that done by tapping on the Menu > Settings > Developer Options > USB Debugging Mode.
• You should backup the Samsung Galaxy S6 smartphone before you begin the guide if you have never rooted with the CF-Auto-Root tool before. The CF-Auto-Root tool will unlock your bootloader and wipe your data if it’s your first time.

HOW TO ROOT SAMSUNG GALAXY S6 SM-G920P (SPRINT) RUNNING ANDROID 5.1.1

1. Download the CF-Auto-Root for the G920P device for 5.1.1 from this link.
2. Download the Odin flashing tool from this link.
3. Extract the files to the desktop by utilizing the right-click > extract here option.
4. Turn off the Samsung Galaxy S6 smartphone and reboot it in download mode.
5. Connect the Samsung Galaxy S6 smartphone to the computer with the USB cable and wait a few seconds for the drivers to start working.
6. Double-click the executable Odin flashing tool file that is on the desktop and the Odin app will open on the computer.
7. Click the PDA or AP button you can see from the user-interface in the Odin flashing tool on the computer.
8. Upload the tar.md5 rooting file you extracted earlier.
9. Do not make changes to the default settings found from the Odin user-interface.
10. Click the Start button and wait until the tar.md5 rooting file is flashed on your device.
11. The Samsung Galaxy S6 will reboot automatically and then you can close down your Odin app and unplug from the computer.

You have changed the stock operating system that was running on your S6 mobile for an unlocked version. That means you can start installing any of the app from the Google Play Store that ask for root permissions to run. Some of those apps you might be interested in installing include the Titanium Backup app and the Greenify app. Titanium is the best backup solution apart from taking NANDroid backups with a custom recovery, and the Greenify app will tune-up your apps so they are running more efficiently.