It allows for deep-level manipulation of the smartphone, not just a factory reset.īy default, the bootloader is locked. Bootloader is the engineering menu of LG Harmony 4, which functionally resembles the BIOS on a computer. What is a bootloader and what is it used for?įor a start, it's worth discussing the bootloader itself. But advanced users know about this term and understand that they need to unlock the bootloader on LG Harmony 4. Some people may confuse it with the standard Downloads application, through which files can be downloaded from the Internet. The vast majority of LG Harmony 4 owners are not aware of the feature called the 'bootloader'.