Oppo A37 does not have a dedicated Fastboot mode like Google devices. MediaTek phones use Preloader or Meta Mode for low-level access.
Keep holding both buttons until the screen lights up and displays a logo, text, or a fastboot/bootloader screen.
Ensure your Oppo A37 has at least 50% battery life.
: Let go of both keys as soon as the Fastboot Mode screen appears. Method 2: Using ADB Command (Computer Required)
Now for the magic command. Type the following exactly:
: Go to Settings > About Phone and tap Build Number 7 times.
Confirm the action on your phone screen. This wipes all user data.
EDL mode is more powerful than Fastboot but also more dangerous. , as flashing the wrong partition can permanently damage the device.
: Some sources, including user experiences and general guides for Oppo devices, mention Volume Down + Power as an alternative that can be effective for some models. If Volume Up + Power doesn't work, try this alternative combination first.