Section 1: How to Root/ Return to stock Stock 4.1.1 JellyBean with Odin
Step 1: Download and install these files to your pc:
Samsung driver- TinyW.in - #TeamWin URL Shortener
worry about the link saying GSIII, it still works fine on the GN2.)
Step 2: Download one of the rooted stock odin images below to your pc:
Root66_VZW_stock_VRLAJB 4.1.1- Dev-Host - - The Ultimate Free File Hosting / File Sharing Service
be unzipped to extract the .tar file. also do not worry about the md5 extension)
mirror- root66_VZW_stock_system.7z ::. | by mrRobinson for Galaxy Note 2
Step 3: Power device off, hold the volume down/home/power keys until you see a yellow triangle, then press the volume up key to access "odin or download mode".
Step 4: Open odin and connect the oem usb cable from pc to device. Adb driver should automatically install(atleast it did for me on windows 7). There should be a "comport number" in upper left hand corner of odin indicating communication between the pc & device.
Step 5: Uncheck Auto reboot
Step 6: Click on the PDA function of odin. Select the rooted system.img you downloaded in step 2, then select start. This operation should take less than 8 minutes before odin will say pass/reset.
Step 7: Pull and reinstall battery.
Step 8: Press and hold the volume up/home/power buttons until you see a green android. You should boot into ASR(Android Stock Recovery)
Step 9: Wipe cache.(If you experience errors, boot back into ASR and wipe data.)
Step 10 reboot!
**This will not wipe data/factory reset unless you chose to do so after you flash the new image**
(It is recommended to wipe data in ASR if you experience problems after the install)
**This is a fully working root method, everything works. All issues reported early in the thread have been fixed**
Credit goes to MrRobinson and Beanstown101!!
How to unroot 4.1.1 JellyBean
1. There is no stock image released as of 12/3/12. However the root image MrRobinson created, for all intents and purposes, is stock.
2. There are two additional files, /system/xbin/su and /system/app/Superuser.apk.
3. If you remove those two files with a app such as filemanager you are back to unrooted stock.