Razer Phone has also released factory images for its device, which means you can flash the firmware manually on your device in critical situations, but it requires unlocked bootloader. As said above, unlocking Razer Phone Bootloader is a very simple process. All you need ADB and Fastboot driver setup on your computer.

The below given guide notes that unlocking bootloader will void your device warranty, so do it at your own risk. Also, make sure to backup all important files, as this process will factory reset your device for security reason. Prerequisites: – ADB and fastboot driver setup on your PC – Ensure at least 50% battery charge remaining on the phone

How to Unlock Razer Phone Bootloader

  1. First, enable ‘Developer Options’ menu by going to Settings > About phone > tap Build number 7 times.
  2. In ‘Developer Options’, enable OEM unlock and USB Debugging.
  3. Switch off the phone, press and hold the Volume Down to boot into ‘Download Mode’.
  4. Connect the phone to your PC, go to the ADB installation folder and open a command window from there.
  5. Now, decide if you want to do a standard unlock or critical unlock. [Critical unlock allows flashing bootloader files directly, otherwise you will end up with errors].
  6. Depending on your needs, execute the below command: fastboot flashing unlock fastboot flashing unlock_critical
  7. Follow the prompts on your device, and then reboot. Finally, check unlock status of your device by issuing the command ‘fastboot oem device-info’. If the device is unlocked you will get ‘true’.

How to Lock the Bootloader on Razer Phone/h4>

Locking the bootloader is recommended for security reasons. Some applications will not work with an unlocked bootloader.

  1. Boot your phone into Download Mode, and then connect it to your PC (do not forget to enable OEM Unlock and USB Debugging options in Developer Options menu).
  2. Open a command window inside the ADB installation folder and lock the critical partitions of the Bootloader first by running this command: fastboot flashing lock_critical
  3. Follow the prompts on your device, and then reboot.
  4. After rebooting the phone, lock the remaining of the bootloader with this command: fastboot flashing lock Follow the prompts on your device, and then reboot. (source)