: Turn off the device completely. If the screen is locked and you cannot power off normally, press and hold the Power (Side) + Volume Down buttons until the screen goes black. Use Key Combination
Unlike older Galaxy A series phones, the Galaxy A55 (especially models with an Exynos 1480 processor) has a locked bootloader by default. You cannot flash custom recoveries (like TWRP) without unlocking the bootloader, which voids your warranty and triggers Knox security. This guide is strictly for the .