How to Unroot Your Nexus S 4G: A Step-by-Step Guide

Before you begin this process, it's essential to take a few precautions. First, consider taking an Android backup or some type of backup just in case you ever want to go back to being rooted or in case you mess up somehow. This will ensure that you can restore your device to its previous state if needed.

Additionally, make sure you have ADB (Android Debug Bridge) set up and running on your device. If you haven't done so before, don't worry – we'll cover how to set it up in a separate tutorial. Once you've completed the setup process and taken your backup, you can proceed with downloading the unroot files from our website's category for unrooting.

To begin, navigate to the "Unrooting" section of our website and click on the regular download option (or select the premium account if you have one). The download should start immediately, so be patient as it completes. Once the files are downloaded, place them on your desktop and extract the contents. You should now have approximately six files.

The next step is to copy these files over to your Android SDK tools folder. This will ensure that they're easily accessible for future use. After copying the files, open a command prompt window and navigate to the ADB tools folder. From here, you'll need to flash the stock boot image on your device. To do this, follow the commands provided below:

Fastboot: Flashing Stock Boot Image

1. Open the command prompt window and navigate to the ADB tools folder.

2. Type the following command: `fastboot oem reboot recovery`

3. Wait for your device to boot into Recovery mode.

4. In the Recovery menu, select "Apply update from external storage" and navigate to the unroot files folder on your desktop.

5. Select the stock boot image file (usually named something like "boot.img") and confirm that you want to flash it.

6. Wait for the flashing process to complete.

Once the flashing is done, your device should now have a clean, stock boot image installed. You'll know this when the command prompt window displays the message "ok" in response to the flashing command.

Next, you'll need to flash the stock system image on your device. This process is similar to the one used for the boot image:

Fastboot: Flashing Stock System Image

1. Open the command prompt window and navigate to the ADB tools folder.

2. Type the following command: `fastboot oem reboot recovery`

3. Wait for your device to boot into Recovery mode.

4. In the Recovery menu, select "Apply update from external storage" and navigate to the unroot files folder on your desktop.

5. Select the stock system image file (usually named something like "system.img") and confirm that you want to flash it.

6. Wait for the flashing process to complete.

This time, after flashing the system image, you'll also need to erase the cache partition:

Fastboot: Erasing Cache Partition

1. Open the command prompt window and navigate to the ADB tools folder.

2. Type the following command: `fastboot erase cache`

3. Wait for the erasure process to complete.

Finally, you'll need to re-lock the OEM boot loader on your device. This will ensure that your device boots back into a clean, stock environment:

Fastboot: Re-locking OEM Boot Loader

1. Open the command prompt window and navigate to the ADB tools folder.

2. Type the following command: `fastboot oem lock`

3. Wait for the re-locking process to complete.

After completing these steps, your device should now be fully unrooted and booted back into a clean, stock environment. To verify that everything has worked correctly, open your device's "About Phone" section to ensure that it displays all the necessary information in a similar format to what you see when viewing this tutorial.

By following these step-by-step instructions, you should now have successfully unrooted your Nexus S 4G and restored its device to its original state.

"WEBVTTKind: captionsLanguage: enhey guys this is damian with the unlocker.com in this video i'm going to show you how to unroot your nexus s 4g so before you begin there's a couple things you might want to do the first is an android backup or some type of backup just in case you ever want to go back to being rooted or in case you mess up somehow and the second thing is you have to have adb up and running now if you rooted the first time chances are you have adb but if you don't you can head on over to our how how to uh set up adb tutorial and we'll have you all set up in a matter of minutes so after your adb is all set up and you've done a backup in case um anything goes wrong if you've chosen to do so we need to download the unroot files so head on over to the category unrooting and then click on here then we need to click on the regular download or if you have a premium account you can click on that and then the download is going to go ahead and start okay so the next step we need to make sure that android debugging is on so to do that we're going to go into your menu select settings scroll down to or scroll until you find applications then development and then check us usb debugging if it's not already okay now turn off your device okay so with your phone powered off plug in the usb cable and now with the usb cable plugged in we need to power the phone back on into fastboot so hold the volume up button and the power button okay now we're in fastboot after it's done downloading place it on your desktop and then extract it and you should have about six files once it's done extracting so you want to copy those files and move them over to your android sdk tools folder so after the files are copied over to your adb tools folder we need to open the command prompt window so go ahead and do that then once the command prompt windows open we need to navigate to the adb tools folder so the first command you're going to do once you've accessed your adb tools folder is we're going to flash the stock boot so you follow the commands here on your window and then hit enter and then when it's finished it should say okay so for the next line of command we're going to flash the stock system image and we basically do the same thing as as the boot image um once it says okay your it flashed successfully we need to repeat these steps for the next two images which are going to be recovery and user data okay so after you've entered the last line which is the userdata.imagefile you should see everything says okay and it should basically look exactly like my command window does here so if it does we can go on and do the erase cache part portion okay so after you type out the command fastboot race cache you should also see it says okay and then finished and then for the final step we're going to re-lock the oem boot loader and to do that we're going to type fastboot oem lock okay so after you reboot the phone if you want to double check to make sure that you are successfully unrooted and back to stock if you go into your about phone section it should look very similar or identical to what i have here and you are now done enjoyhey guys this is damian with the unlocker.com in this video i'm going to show you how to unroot your nexus s 4g so before you begin there's a couple things you might want to do the first is an android backup or some type of backup just in case you ever want to go back to being rooted or in case you mess up somehow and the second thing is you have to have adb up and running now if you rooted the first time chances are you have adb but if you don't you can head on over to our how how to uh set up adb tutorial and we'll have you all set up in a matter of minutes so after your adb is all set up and you've done a backup in case um anything goes wrong if you've chosen to do so we need to download the unroot files so head on over to the category unrooting and then click on here then we need to click on the regular download or if you have a premium account you can click on that and then the download is going to go ahead and start okay so the next step we need to make sure that android debugging is on so to do that we're going to go into your menu select settings scroll down to or scroll until you find applications then development and then check us usb debugging if it's not already okay now turn off your device okay so with your phone powered off plug in the usb cable and now with the usb cable plugged in we need to power the phone back on into fastboot so hold the volume up button and the power button okay now we're in fastboot after it's done downloading place it on your desktop and then extract it and you should have about six files once it's done extracting so you want to copy those files and move them over to your android sdk tools folder so after the files are copied over to your adb tools folder we need to open the command prompt window so go ahead and do that then once the command prompt windows open we need to navigate to the adb tools folder so the first command you're going to do once you've accessed your adb tools folder is we're going to flash the stock boot so you follow the commands here on your window and then hit enter and then when it's finished it should say okay so for the next line of command we're going to flash the stock system image and we basically do the same thing as as the boot image um once it says okay your it flashed successfully we need to repeat these steps for the next two images which are going to be recovery and user data okay so after you've entered the last line which is the userdata.imagefile you should see everything says okay and it should basically look exactly like my command window does here so if it does we can go on and do the erase cache part portion okay so after you type out the command fastboot race cache you should also see it says okay and then finished and then for the final step we're going to re-lock the oem boot loader and to do that we're going to type fastboot oem lock okay so after you reboot the phone if you want to double check to make sure that you are successfully unrooted and back to stock if you go into your about phone section it should look very similar or identical to what i have here and you are now done enjoy\n"