Have a rooted Nexus S 4G and need to sell it or return it for warranty? We have you covered. Follow this easy tutorial on how to unroot your device.If you want to root your device use this method Here.
BY EditAndroid
I. Before you begin.
1. Do a nandroid backup as this will erase everything on your phone (except for your sd card).
2. You must have ADB set up and running. If you do not, head on over here, to get it set up.
II. Unrooting.
1. Download the unroot files from here.
2. Unzip them and place them in your adb/tools folder.
3. Power the phone off.
4. Plug your phone via the USB cable
5. Power the phone back on into fastboot (hold the volume up button and power button simultaneously).
6. Make sure debugging is check on under settings>applications>development.
7. On your computer, click on the Start menu.
8. In the search box in the start menu, type cmd and hit enter.
9. When the command prompt window opens, you must navigate to the folder adb is in. Type the following with hitting enter at the end of the line:
cd C:\androidsdk\tools
10. In adb, type the following hitting enter after each command line:
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot flash userdata userdata.img
fastboot erase cache
fastboot oem lock
Congratulations, you know have a completely stock, unrooted phone with a locked bootloader!
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