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How to Lock Bootloader in All Oneplus Smartphones (2022) – Step by Step Guide

How to Lock Bootloader in All Oneplus Smartphones (2022) – Step by Step Guide

OnePlus is favourite among custom rom communities and Root modding enthusiasts. Bootloader unlock on OnePlus smartphones is very easy . But some people lose Widevine L1 and some company apps wont work with unlocked bootloader. Also its recommended to lock bootloader before going to service center.  So ,  let’s see how to LOCK bootloader of Any Oneplus Smartphone.

Also Read : How to unlock bootloader

Prerequisite :

    • A Windows PC  with At least windows 7 ultimate
    • ADB Drivers XDA : Download
    • Oneplus Drivers : Download.
    • A peace of MIND and Common Sense 


1.Install ADB Drivers on PC.


How to Root Oneplus 8 & 8pro complete guide Unlock Bootloader & Rooting


TYPE Y and press Enter until you finish the ADB setup


After finishing the ADB setup you will see a folder named adb in C-Drive


2. OEM Bootloader LOCK

★Take your OnePlus smartphone with Atleast 80% battery.
★Open settings<About phone Tap build number 7 times until you see you are a developer


★Now open developer options and Turn on ‘USB Debugging’ Settings


★After this Now enter into fast boot mode and Connect your Device to PC via USB CABLE.

Read here – How to enter Fastboot mode in OnePlus Smartphones


★Now open adb folder in C-drive. Type cmd in address Bar . Then you will see adb command prompt screen.

★Type fastboot devices or adb devices and hit enter key to check if the device is connected properly. If there is any serial number after hitting enter then your device is connected properly.

★Type fastboot oem lock . Then you can see a Screen in Your phone with options to LOCK or Not . Navigate with volume buttons and Press accept to lock bootloader with Power button.
(warning: as a safety measure Your Data will be wiped )

Voila, Now your device bootloader is successfully locked and wait for sometime until it boots into OS.

Method for custom Rom Users

we recommend custom rom users Do not lock their Bootloader in Custom Roms although in some stable roms like pixel experience and lineage os. Prefer Locking the Bootloader only in Stock Oxygen OS.

  • Custom Rom users can Flash MSM Unbrick Tool to automatically Lock Bootloader and enjoy Stock Oxygen OS
  • watch this Video from 4:00 to 5:40 to understand better about Msm Process For Custom rom users


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