From galaxynote4root.com:
This root method will work on most Galaxy Note 4 models including:
- SM-N910F – International
- SM-N910G/SM-N910H Asian
- SM-N910T – T-Mobile U.S.
- SM-N910P – Sprint
- SM-N910R4 – US Cellular
- SM-N910W8 – Canadian
- SM-N910C – Thailand
- SM-N910U – Hong Kong
- SM-N910K/SM-N910L/SM-N910S – Korean KT, LG, SK Telecom
- SM-N9100/SM-N9106W/SM-N9108V/SM-N9109W
For AT&T or Verizon Note 4, you may have to wait for another root method.
*Note – This root method DOES NOT ERASE ANYTHING on your phone.
This root tutorial is for Windows computer but you can use JODIN instead ODIN on Mac OSX or Linux/Ubuntu.
Step 1. Power off your Galaxy Note 4 then hold down Volume Down, Center Home, and Power buttons together until you see the warning screen like below:
Step 2. Hit Volume Up button to enter ODIN Download Mode then connect a micro-USB cable from your Note 4 to your computer.
Step 3. Go to ChainFire’s XDA thread here and download the appropriate CF Auto root for your Note 4 model.
Step 4. Unzip the downloaded file and you should see a bunch of files. Double-click on ODIN3-v3.07.exe to run ODIN program.
Step 5. Next, you should see a blue, highlighted box with a random COM number. If you see this, you have proper Note 4 Windows drivers installed. If not, download and install Note 4 Windows drivers.
Step 6. Choose “PDA” then select the file ending in “tar.md5″.
Step 7. Hit the “Start” button and CF Auto Root should be flashing to your Note 4.
Step 8. When done successfully, you should see “RESET!”. If you get stuck, try using a different USB hub/cable and simply try again.
Step 9. Reboot and you should find a new app called “SuperSU” in your app drawer. Congratulations! You’ve successfully rooted your Galaxy Note 4!
Step 10. Open up SuperSU app and update the binary if needed.
Step 11. Also, disable KNOX if SuperSU asks you. KNOX is an annoying, useless security program Samsung has put on your phone and it will only interfere with root and rooted apps.