[Nothing Phone 1] pankspoo:
So we unlocked the bootloader and rooted nothing phone 1

Thanks to @Sib64

But at some stages we feels roots causing issues and we want to Unroot and relock the phone so we will get stock orginal phone condition

So let's discuss how to get back this condition by following method you can just Unroot or Unroot with relocking your device.

Downloads:

Nothing OS 1.0.2 only Indian:

Stock_boot.img | by Sib64 for Generic Device/Other

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

www.androidfilehost.com

Nothing OS 1.1.0

Global( India and other regions)

Android File Host - Free file hosting for Android developers

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

www.androidfilehost.com

Only EU regions:

European_Stock-boot.img | by Sib64 for Generic Device/Other

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

www.androidfilehost.com

Nothing OS 1.1.2

Global( India and other regions Not for EU region)

AndroidFileHost.com | Download GApps, Roms, Kernels, Themes, Firmware and more. Free file hosting for all Android developers.

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

www.androidfilehost.com

Only EU regions

EAA_1-1-2_boot.img | by Sib64 for Generic Device/Other

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

www.androidfilehost.com

Nothing os 1.1.3 gobal stock boot image:

Global_Nothing_OS_1.1.3_boot.img | by Sib64 for Generic Device/Other

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

www.androidfilehost.com

Nothing os 1.1.3 EU stock boot image:

EEA_Nothing_OS_1.1.3_boot.img | by Sib64 for Generic Device/Other

Download GApps, Roms, Kernels, Themes, Firmware, and more. Free file hosting for all Android developers.

www.androidfilehost.com

Fastboot and adb drivers:

https://dl.google.com/android/repository/platform-tools-latest-windows.zip

Requirements:

1)PC/ laptops with fully working adb and fastboot drivers

2) stock boot image of your running nothing phone 1

Note:

1)by locking bootloader you will loose your full data on phone so keep backup of your device.

2) always follow the relocking after Unrooting your phone.

A)Unrooting:

1) Download the required boot image as per your device and keep at specific location on your pc/laptop.

2) keep enable developer setting and usb debugging in your phone.

3) power off the phone and boot it in to fastboot using vol down+power button

and connect phone to pc

4)now open the cmd window on in the folder where you placed the stock boot.

Then type following command to flash the stock image

fastboot devices

fastboot flash boot filename.img

fastboot reboot

4) phone will reboot to stock rom and if you check magisk and root access your root has been removed now.

B) locking bootloader:

1) Boot your device in to fastboot mode again using hardware combo as i already given above.

2) Now open cmd window in any folder on pc and type following commands and enter

fastboot flashing lock

3)On phone use volume keys to select the lock bootloader option and press power button to confirm the lock.

4) Phone will start rebooting and will wipe whole data on your phone

5)If you boots back to bootloader mode then you will see the bootloader mode is locked now.

Thats it we locked and unrooted our nothing phone 1

These are following video tutorials if you want to let's take a look.

Relock and Unroot the phone:

Unlock and root your phone: