Disclaimer I am not responsible if your phone gets bricked, by following the process you are voiding your warranty and significant damage may be caused to your device. If you are naive enough to screw somewhere, then it is your responsibility. Software are unpredictable in nature, one may/may not act as predicted especially in case of rooting (personal experience). Hence my friend, treat with ULTRA care. In short, I AM NOT RESPONSIBLE FOR ANY DAMAGE TO YOUR PHONE
Step 1: Download Odin on your PC which you need to run on the PC to flash the rooting file.
Step 3: Now grab your phone, Power it off and press Vol Down+Home+Power buttons till you see the green Android robot. Press the power button again to enter into Download mode.
Step 4: Now run Odin on your PC which you have downloaded in Step 1 and connect your phone to your PC via the USB cable.
Note: Your phone must be in download mode when you connect it with your PC
Step 5: After you have connected your phone, one of the ID:COM devices will turn yellow and your phone’s COM/Port will appear on it. Now click on ‘PDA’ and choose the file ‘CF-Auto-Root-jflte-jfltexx-gti9505.zip’ from your desktop. Also make sure that ‘Auto Reboot’ and ‘F. Reset’ options are checked.
Step 6: Click on the Start Button. The installation will start from Odin and when it is complete your phone will start the process by moving into recovery and the ID:COM box will turn green.
Step 7: After you see the home screen, please remove your phone from your PC. Hurray!! you have rooted!!!