When you turn on your Android phone and see “Custom Binary Blocked by FRP Lock” in red color at the top of the screen, you might get confused and be clueless about it. This error usually occurs at the screen on which the phone’s logo/model number appears and it will not boot up beyond this stage. It also appears when you try to boot to the recovery which gets redirected to a screen that tells you you’re custom binary blocked. You cannot use recovery, cannot do a reset, nothing! You can access Download Mode but you can’t seem to flash firmware. Commonly most devices require a “Binary 4 FRP Unlock” file which you flash via Odin3 . Put it in the AP section and flash it. This will reset the device.