The Samsung Galaxy Note 2 first shipped with Android 4.1 Jelly Bean and was later upgraded to Android 4.1.2. Ahead of the official release, the device received the latest Android 4.2.2 software via custom builds released by developers. 

Samsung Galaxy Note 2
Samsung Galaxy Note 2

To install custom ROM, the device should be rooted and have custom recovery installed. But rooting the device voids manufacturer's warranty. However, users can reclaim the warranty back by unrooting the handset.

Here is an opportunity for Galaxy Note 2 users who have rooted their devices to unroot the same by following our step-by-step guide and return to stock official firmware.

IBTimes UK reminds its readers that it will not be held liable for any mishap. Users are also advised to verify that their devices meet following requirements.     

Pre-requites

1) Install USB Driver for Samsung Galaxy Note 2 to transfer files between the Android device and computer.

2) Enable USB Debugging Mode on the phone to connect the Android device with the computer and use the Android SDK with it. [Press Menu>> Settings>> Applications. From there navigate and click on Development option and ensure the USB Debugging Mode is turned on.]  

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 CWM/TWRP already installed then back up data using the recovery.      

4) The Galaxy Note should have above 80% battery charge.

5) The phone should be factory unlocked and not locked to a particular carrier.

6) The Galaxy Note 2 should be rooted. Click here for step-by-step guide to root Samsung Galaxy Note 2.  

7) The official Jelly Bean firmware works only on Samsung Galaxy Note 2 N7100. Applying this to any incorrect variant might brick the device. Therefore, verify the model number of the Galaxy device by selecting Settings>> About Phone>> Model number.   

Steps to unroot Samsung Galaxy Note 2 to stock official firmware

Step-1: Download appropriate (according to region) official firmware for Samsung Galaxy Note 2 to the computer

Official firmware download link

Step-2: Extract the downloaded zip file to get a .tar.md5 file along with few other files   

Step-3: Download Odin3 v1.85 which will help to install the official firmware. Extract the Odin zip 

Step-4: Switch off the Galaxy Note 2 and wait for five to six seconds for vibration to confirm complete power off   

Step-5: Now boot the phone into Download Mode by pressing and holding Volume Down, Home and Power buttons together until the device turns on. Now press the Volume Up button to continue to enter Download Mode   

Step-6: Now run Odin by double clicking on the Odin executable file

Step-7: Connect the Note to the computer using USB cable while it is in the Download Mode. Wait until Odin recognises the phone. Once the device is connected successfully an Added message will appear under Odin. Also the successful connection will be indicated by the ID: COM turning yellow with the COM port number  

Note: If the Added message does not come, then try the USB port at the back of the computer. If Odin still fails to detect the device, then reinstall USB driver.

Step-8: Select these files extracted from the stock firmware zip folder to install on the phone

a) Click the PDA button and select the file with .tar.md5 extension

b) Click the Phone button and select file with Modem in its name

c) Click the CSC button and select file with CSC in its name

d) Click the PIT button and select the .pit file  

Note: Ignore the last three steps (b, c and d) in case such files are not found.

Step-9: Configure Odin settings. Ensure the Auto Reboot and F.Reset Time checkboxes are selected in Odin. But uncheck the Re-partition option, select it only when a .pit file is being used

Step-10: Once everything is set, click the Start button in Odin. The installation should begin now and would take few minutes to complete

Step-11: Upon completion of the installation process, the phone will restart automatically and soon a PASS message with green background will appear in the extreme left box at the top of Odin indicating successful installation. When the hone screen appears on the phone, unplug the USB cable from the device to disconnect it from the computer

Samsung Galaxy Note 2 should now be unrooted and back to stock official firmware. Head over to Settings>> About phone to verify the software version running on the handset.

Click here for guide to install Android 4.1.2 XXDME6 Jelly Bean stability update on Samsung Galaxy Note 2 GT-N7100.

[Source: The Unlockr]