So, if you wanna lock your phone’s bootloader for whatever reason then it is possible. In this post, you will get to know all about locking the bootloader along with what is needed to do it and a step-by-step guide to relocking the bootloader of an unlocked Xiaomi, Redmi, or Poco phone.
Bootloader locking is as simple as unlocking it but it has some more steps added to the process. Also locking the bootloader again will wipe all the data from the phone so make sure to take a backup of it.
Requirements for Locking Bootloader
1. Unlocked Xiaomi, Redmi, Poco Smartphone
Of course, you will need your phone with bootloader unlocked.
2. Fastboot ROM for Your Phone
You will also need to download the fastboot ROM for your phone, you can download the Fastboot ROM from Xiaomifirmwareupdator.com.
You can read “how to download fastboot ROM” here.
3. Mi-Flash Tool
The Mi-Flash tool will be needed to flash the ROM and to lock the bootloader. Download the Mi-Flash Tool from here.
How to Re-Lock Bootloader
Begin with downloading the stock fastboot ROM for your phone. You can download the fastboot ROM for your device from the Xiaomifirmwareupdator.com.
Once the fastboot ROM is downloaded, extract the zip file on your computer.
Now first open the Mi-flash tool and connect your phone with fast boot mode.
Once the phone is detected and shown in the Mi-Flash tool, open the extracted ROM folder and copy the location from the address bar.
Now paste the copied address on the Mi-Flash tool’s text box.
Now select the “clean all and lock” option from the bottom-left side of the Mi-Flash tool. Then click the “flash” button.
The rest of the work can be seen in the below video :