If your device is listed with a string of random characters, type the final command to force the reboot: adb reboot bootloader Use code with caution.
This is the quickest way to access Fastboot mode if your phone is powered off. : Completely turn off your OPPO A37.
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: Open a command prompt or terminal on your computer and type: adb reboot bootloader Your phone will automatically restart into fastboot mode.
That said, here is the correct method to open Fastboot mode.
However, there is a well-known issue with the Oppo A37: to enter Fastboot. Oppo has a different, proprietary approach.
: Go to Settings > About Phone and tap Build Number 7 times.
Once your phone screen displays the Fastboot logo, you must ensure your computer recognizes the interface before running scripts. Open your PC terminal window. Type the command: fastboot devices
This method requires the phone to be booted normally and already rooted or with a terminal emulator that has system permissions. On a stock, non-rooted Oppo A37, this often fails.
Fastboot Mode (also called Bootloader Mode) is a low‑level protocol on Android devices that allows you to re‑flash system partitions and update firmware directly from a computer. It operates at a deeper level than Recovery Mode. For Oppo A37 users, Fastboot Mode is essential for tasks such as:
This is the most common way to access Fastboot Mode directly from your device: : Completely turn off your : Press and hold the buttons simultaneously for a few seconds. : Once the Fastboot Mode text or screen appears, release all buttons. Method 2: Using ADB (Requires a PC)