Lenovo Bootloader Unlock Tool Free Download One-Click Tool
A bootloader is a program that runs when you power on your Android device. It tells the device what software to load and how to start the operating system. In simple words, the bootloader is the “key” to control what software your phone can run.
Most Android phones come with a locked bootloader to prevent unauthorized changes. However, if you want to install custom ROMs, root your device, or make other system changes, you need to unlock the bootloader first.