: Simultaneously press and hold the Volume Up and Power buttons.
If your phone boots normally and you have enabled:
Type adb devices and press Enter. You should see your device ID.
If your device remains attached to a terminal setup via your desktop environment, type the direct termination parameter: fastboot reboot Use code with caution.
To open fastboot mode on an Go to product viewer dialog for this item.
Your OPPO A37 will shut down automatically and restart directly into the black diagnostic screen displaying Fastboot layout. Direct Mode Comparison Overview Method Feature Hardware Keys Method ADB Command Line Method No, totally standalone Yes, requires PC connection Prerequisites Functional volume buttons USB Debugging enabled on device Ideal Scenario Boot loops, soft bricks, frozen OS Broken physical keys, routine flashing Execution Time Less than 10 seconds 2–3 minutes configuration How to Exit Fastboot Mode on OPPO A37
