: Go to Settings > Additional Settings > Developer Options and toggle on USB Debugging .
Fastboot is triggered by interrupting the standard boot sequence using physical electronic switches mapped to the motherboard. Simultaneously press and hold the button and the
This guide should help you access Fastboot mode on your Oppo A37. If you encounter issues, double-check each step and verify that your device and computer can communicate properly via ADB.
Press and hold until the OPPO logo boots.
Run:
With your phone successfully in EDL mode, you can use tools like the QPST (Qualcomm Product Support Tool) , MiFlash , or specialized scripts (like the A37-BLUnlocker from GitHub) to flash firmware or unlock the bootloader.
Go to > Additional Settings > Developer Options and toggle on USB Debugging .
If your buttons are faulty or the first method fails, you can use a computer to command the phone to reboot. Enable USB Debugging About Phone Build Number 7 times to unlock Developer Options Navigate to Additional Settings Developer Options and toggle on USB Debugging Connect to PC
If your volume or power buttons are broken, or if you prefer a computer setup, you can command the device to enter Fastboot from a PC. Prerequisites A Windows, Mac, or Linux computer. A working USB data cable. ADB and Fastboot drivers installed on the PC. Step-by-Step Instructions how to open fastboot mode on oppo a37 verified
Ensure your Oppo A37 has at least 50% battery to prevent it from shutting down mid-process.
: Open a command prompt or terminal in your SDK Platform-Tools folder and type: adb reboot bootloader .
Release both buttons the moment the "Oppo" logo appears on the screen.
Below is an essay examining this procedure, its technical significance, and a step-by-step verified guide. : Go to Settings > Additional Settings >
| Issue | Explanation | |-------|-------------| | Phone reboots normally instead of fastboot | You released Volume Up too early | | Shows “Download mode” instead | That’s Oppo’s stock recovery / OFP flash mode — different from fastboot | | fastboot oem unlock not working | Oppo disabled bootloader unlock on A37 | | fastboot flash recovery fails | Normal — Oppo locked the partition |
The hardware key method requires no external computer or pre-configured software environments. It relies exclusively on the physical buttons of the device.
This usually occurs if the Volume Up button was released too early or if the buttons weren't pressed perfectly simultaneously.