Unroot and Restore stock Android 4.1.2 Jelly Bean on Galaxy Nexus GT-I9250

If one of your pals has a Samsung Galaxy Nexus GSM International GT-I9250 with Stock Android 4.1.2 Jelly Bean on it, you more than likely envy him a lot.

Despair not: your own Nexus I9250 can receive the same advantages if you simply unroot the already rooted device by following this guide.


For all those interested, a bunch of pre-requisites ought to be discussed before anything else goes into motion.

The smartphone needs to have its crucial data saved via a backup, the Contacts need to be synced to the owner’s Gmail account, your laptop’s antivirus programs should be turned off, USB Debugging should be turned on, your computer needs to feature on it and the battery of the Nexus GSM International GT-I9250 has to be completely charged.

Once the matter of requirements is solved, some steps must to followed to ensure the success of the unrooting that’s about to happen.Galaxy-Nexus-I9250

Important instructions

  1. Step one will need the owner of the smartphone to perform the following: download , save it on the laptop and extract whatever files are there onto a Fastboot folder (which is in a directory whose name is Platform Tools/Android SDK).
  2. Now switch the smartphone off and boot it into Fastboot Mode. The proper manner to do that is as follows: press + hold Volume Down, Volume Up and Power (but not separately). In step two, the handset will turn on; let go of the three keys and connect the Nexus to the laptop.
  3. Step three is going to ask you to go to the Fastboot folder and tap on Shift while simultaneously right-clicking the white space you’ll spot in that folder.
  4. Step four can be summed up like this: go to the Context Menu and opt for Open command window here. Type in
    fastboot devices
    This should tell you whether or not the connection between the Nexus GT-I9250 and the laptop happened.
  5. For the fifth step you are prompted to type in:
    > fastboot flash bootloader bootloader-maguro-primelc03.img
    > fastboot reboot-bootloader
    > fastboot flash radio radio-maguro-i9250xxlf1.img
    > fastboot reboot-bootloader
    > fastboot -w update image-yakju-jzo54k.zip
    and wait for the phone to restart. When the Android 4.1.2 default’s welcome screen appears, you need to setup up the handset.

How to relock the bootloader

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The best way to relock the phone’s bootloader is offered in this upcoming short tutorial.

  1. For the first step you will be required to switch the phone off and to start is into a mode called Fastboot.
  2. Plug the Nexus I9250 to the comp, then open a Command line Window on the latter. Next: enter
    fastboot devices
  3. After this action lets you know how well the two devices are connected to each other, step three will tell you to type in
    fastboot oem lock

Your Galaxy Nexus GSM International GT-I9250 has its bootloader relocked from this moment on.