How To Open Fastboot Mode On Oppo A37 Better [SAFE]

: Once the Fastboot text or logo appears on the screen, release all buttons. Method 2: ADB Command (Via Computer)

You either released the keys too early, or you are using the wrong volume key. Try again with Volume Up + Power or Volume Down + Power for at least 10 seconds. how to open fastboot mode on oppo a37 better

Fastboot Mode OPPO A37FW - HardReset.info : Once the Fastboot text or logo appears