So, the interested users who wish to root their Samsung Galaxy Note 2 can follow our Step-by-Step guide.
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Pre-Requesites
2) Enable USB Debugging Mode on phone to connect it with computer and use Android SDK with it. [Navigate to Settings>> About phone. Tap on Build Number several times until a message appears saying 'You are now a Developer.' Now enable USB Debugging Mode by navigating toSettings>> Developer Options.]
3) As the tutorial might wipe out all data of the phone, create a backup. If the device is having any custom recoveries such as ClockworkMod or TWRP, then backup data using the same.
4) If the Android phone powers off due to lack of battery during the process, it could damage the device. Therefore, the Galaxy Note 2 should have charge above 80% battery charge.
5) The phone should be factory unlocked and not locked to any particular carrier.
6) The device will lose manufacturer's warranty once it is rooted.
7) The CF-Auto-Root file works only on Samsung Galaxy Note 2 GT-N7100. As applying this to any incorrect variant might brick the device, verify the model number of Note 2 by navigating toSettings>> About phone>> Model number.
8) Now download CF-Auto-Root.
How to Root Samsung Galaxy Note 2 on Android 4.4.2 KitKat
Step-1: Extract the downloaded root file and Odin zip, using Winzip, 7zip, winrar or any other extracting tool, to get CF-Auto-Root-t03g-t03gxx-gtn7100.tar.md5 and Odin3 v3.09.exe respectively
Step-2: Switch off Galaxy Note 2
Step-3: Enter into Download Mode by pressing and holding Volume Down, Home and Power buttons together until a construction Android robot icon with a warning triangle appears on the phone's screen. Now press the Volume Up button to enter into Download Mode
Step-4: Run Odin on the computer Administrator
Step-5: Connect the phone to the computer using USB cable while it is in Download Mode. Wait for some time until Odin detects the device. When the phone is connected successfully, an Added message will appear under Odin message box. Additionally, the ID: COM box in Odin will turn blue with the COM port number indicating successful connection
Please Note: If the Added message does not appear then try another USB port, try the one located at the back side of the computer. In case Odin still fails to recognise the device then re-install USB driver.
Step-6: In Odin, click the AP button and select CF-Auto-Root - t03g - t03gxx -gtn7100.tar.md5 file which was extracted earlier
Step-7: Ensure Auto-Reboot and F.Reset Time check boxes are ticked in Odin. Also verify Re-Partition option is not selected
Step-8: Click the Start button in Odin. The installation process should begin now and take a few minutes to complete
Step-9: When the installation process is completed, the phone will restart and soon a PASS message with green background in the extreme left box at the very top of Odin. Unplug the USB cable from the phone to disconnect it from computer.
Galaxy Note 2 running on Android 4.4.2 KitKat should now be rooted successfully. Open the app drawer in the phone and check for SuperSU app. Also, verify the root status of the device by downloading Root Checker app from Play Store.