So you have just picked up the Samsung phablet — Galaxy Note 2 — and wondering if you could have root-access on it so you can unlock the true potential of it? You’re in luck. Chainfire, a known name in Android industry, has come up with a root method for the device and this guide shows exactly how you can use it to root your Samsung Galaxy Note 2 device. After rooting your device, you’ll have access to hundreds of root-only apps available in the store as well as you can flash a custom recovery and enjoy custom ROMs. But before doing any of these, you need to root your device so get onto the procedure below and do that first.
By editandroid.blogspot.com
I. Before You Begin:
1. This will void the warranty of your device. However, you can reinstate the warranty by unrooting your device if there’s any unrooting procedure available.
2. You should have a Windows based PC to do this procedure.
II. Downloading Required Files:
2.
Odin (It’s attached in the second post)
III. Rooting the Samsung Galaxy Note 2 (GT-N7100):
1. Place both the files you downloaded to your Desktop.
2. Unzip files from both the archives to your Desktop.
3. Launch the Odin tool by double-clicking on its executable file available on your Desktop.
4. Click on PDA and select the CF-Root file you extracted earlier from the archive.
5. Make sure that the Repartition box isn’t checked.
6. Turn OFF your device
7. Reboot your device into Download mode. To do that, press and hold the Volume DOWN+Home+Power buttons together.
8. Once inside Download mode, connect your device to your PC via USB cable.
9. Hit Start button in the tool and it’ll start flashing the file.
10. You should be rooted once the file’s been flashed!
11. You’re done!
Awesome! Your Galaxy Note 2 phablet has been successfully rooted and is ready to be loaded with some cool root-only apps!
How to Unroot the Samsung Galaxy Note 2 (GT-N7100)

Just after the launch of the Samsung Galaxy Note 2, users started looking for a root method to gain root-access on the device and enjoy plethora of apps available for rooted-devices only. The developers did their work and a root method got released to please the users. You may have rooted your device, but there comes a time when you need to return to stock. So, for those folks, here we’ve a guide that teaches how you can unroot your Samsung Galaxy Note 2 and get it back to stock. Let’s get started:
I. Before You Begin:
1. Your device needs to have at least 70% of battery life left for an uninterrupted process.
2. This works on the GT-N7100 model only.
II. Downloading Required Files:
III. Unrooting the Samsung Galaxy Note 2 (GT-N7100):
1. Download and place both the files onto your Desktop.
2. Extract files from both the archives to your Desktop. You can use free tools like WinRAR to do so.
3. Once you’re done with extraction, double-click on the Odin executable file available on your Desktop.
4. Click on PDA tab and select the Stock Firmware file you got after extracting the Stock Firmware archive.
5. Checkmark the boxes that say Auto Reboot and F. Reset Time.
6. Make sure that the Repartition box isn’t checked as checking it may brick your device
7. Turn OFF your device.
8. Reboot your device into Download mode. To do so, simply hold down the Volume DOWN+Home+Power buttons together.
9. Once you’re inside Download mode, connect your device to your PC via USB cable.
10. You should now see one of the boxes in Odin turning yellow, that means your device’s been recognized by your PC.
11. Click on Start button and it’ll start flashing the file.
12. Your device should be unrooted within a few minutes.
13. You’re all set!
Wonderful! Your device’s now back to the stock firmware and is unrooted as well. Now you cannot run any root-only apps on your device
Do At Your Own Risk