If you want to return to factory settings and restore security: fastboot flashing lock (Warning: This also wipes all data.) To help you get the exact steps, could you tell me: What is the exact model of your phone? operating system is your computer running (Windows, Mac, Linux)? Are you planning to install a specific Custom ROM

Unlocking your bootloader is the first step toward digital sovereignty. By using the command, you’re moving past the "consumer" phase and into the "developer" phase of phone ownership.

There is effectively only one "universal" command used by the Android Open Source Project (AOSP) and the vast majority of Android device manufacturers (Google Pixel, Motorola, OnePlus, Xiaomi, etc.).

Here is the content for a page or guide focused on — meaning using official or safe methods without paying for third-party tools.

To unlock your Android bootloader for free, you primarily use Fastboot commands