2021 saw the rise of "MTK Auth Bypass" tools. These tools exploit vulnerabilities in the Preloader's USB stack to bypass the need for authorized service accounts when flashing or unlocking the bootloader.
: Passing control to the Little Kernel (LK) or secondary bootloader. preloaderk62v164bspbin 2021
preloader_k62v1_64_bsp.bin (often associated with the "2021" version) is a critical bootloader component for MediaTek MT6762 (Helio P22) 2021 saw the rise of "MTK Auth Bypass" tools