[Galaxy Note II Q&A, Help & Troubleshooting] aukhan:
Why Unroot your device?

There are many reasons to unroot device 1 common reason is to claim warranty, or selling your device or may be bunch more reasons which we cannot specify but these are 2 common reasons, Let’s start the tutorial on how to do this.

Requirements: Obviously Rooted Samsung Galaxy note 2 N7100 (Not tested on other versions as I only have N7100 but it’s pretty much same apart from the Firmware)

Mobile Odin

Triangle Away

Pre Rooted Samsung Firmware (recommended):good: or Stock Firmware (Lengthy Process)

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Just for the experiment purpose I have done this if any steps are wrong please do mention in comments below and let me know so I can correct it.

Firstly I have a Custom Rom monxDified and Custom Kernel RedPill as shown in the screen shot.

Now I have download Mobile Odin Lite free or Mobile Odin Pro Paid by Chainfire installed and after installation completes it may ask you to download the data please download it via Wifi or Mobile Data.

Now I have downloaded Pre Rooted Stock Firmware or Stock Firmware which can be downloaded from Sammobile or from Dr.Ketans Thread Pre rooted Firmware (Saves lot of time)

Note: Suggest to download the Pre rooted firmware so it will be easy to install Triangle away and reset the binary count if not you will have to root it again and install triangle away to reset the counter.

Now place the Pre rooted Stock Firmware in SD Card or Phone memory, I have placed it on SD I recommended to place it on SD CARD just to be on safer side,

Now launch the Mobile Odin (How to Flash Firmware using Mobile Odin) and click on Browse and locate the Stock firmware from SD Card or Phone memory and click on Flash Firmware now this will let you ,

Once Mobile Odin completes the installation now device will reboot and your device will have Stock Kernel, Stock Rom and Stock Recovery and after that you will have Boot Loop now you need to go to Recovery Press Volume Up + Menu+Power button let go these buttons as soon as you see the Samsung N7100 scren and do a Factory reset (will Erase Data from the phone Memory) and device will now reboot now it should boot up to android Setup.

Now i have all Stock but Rooted with counter raised .

Now I have downloaded Triangle away by Chainfire installed and after installation completes it may ask you to download the data please download it via Wifi or Mobile Data.

And Reset counter now by launching the triangleaway and navigating or clicking on Reset Counter and it will now boot to Recovery and follow screen instructions by pressing the volume button. Once this is complete resetting the counter now uninstall the Triangle away from app drawer.

Before Triangle Away & After Triangle Away

Open Super Su and select Full unroot once successfully completed it will reboot your device automatically.

Unroot Process completed :) :good:

Note: Just to be on safer side to claim warranty you should always do a factory reset on your device and format your SD optional and then take to service Center so there will be no signs of root on your device.