Type the following command and press Enter: adb devices Look at your phone screen; a prompt may ask you to "Allow USB Debugging." Tap Allow .
Press and hold the Power Button for about 10–15 seconds to force a restart. how to open fastboot mode on oppo a37 better
When you are finished, type:
Hold the Power button for 10–15 seconds to force a restart. If it continues to loop, use Method 1 to enter Recovery Mode and perform a Wipe Data/Factory Reset . Safety and Best Practices Type the following command and press Enter: adb
Keep holding both buttons until the Oppo logo appears on the screen. Once you see the logo, release both keys. If it continues to loop, use Method 1
: From the recovery menu, navigate using the volume keys and select "Reboot to bootloader" or "Enter fastboot" if available.
If everything is set up correctly, you will see your device’s serial number.