***Here you can see the method of rooting your Samsung device...
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*First you have to Install ODIN in Your Pc or Laptop
https://mega.nz/#!LRoUkJwB!njwUZnBWa2OKHZstVfTVySkXyEAO6dDHpOw8UB7V62k
download from here....
*Now You have to download root file for Your device for example....
Like I have Indian model sm-g925i so i have to download this file, and same as you have to download this root file according to your model no...
https://autoroot.chainfire.eu/
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2nd Step:
Now You have to run download mode by pressing "POWER BUTTON+HOME BUTTON+VOLUME DOWN BOTTON" it will look like this...
Now Install Samsung usb driver
http://www.cydiaos.com/download-samsung-galaxy-s6-usb-drivers-edge/
Now Connect your phone with your pc or laptop and open ODIN software
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Now Hit "AP button" and add ROOT file and Hit "START"
It will take some time and boom your phone is completed, install root checker and check :)
For Custom roms please subscribe my channel..
https://www.youtube.com/watch?v=FZ27J6cYrBA
For any Question please comment here :)