PD2151F_EX_A_13.1.8.9.W30 → preloader is inside images/ folder.
. For the Vivo Y33s (model V2109/PD2147F), the preloader file is typically used for: Recovering Brick Devices : Fixing "Dead Boot" or devices stuck on the logo. Bypassing Security y33s preloader file
Vivo Y33s preloader file is a critical low-level software component responsible for the initial boot sequence and establishing a connection between the device's MediaTek (MTK) chipset and a computer for flashing or repair. Functionality and Importance Boot Management PD2151F_EX_A_13