: Plug your phone into a computer using a USB cable.
Go back to Settings > Additional Settings > Developer Options . Toggle on USB Debugging .
As soon as the Oppo logo flashes on the screen, release the Power Button but keep holding the Volume Down Button .
: Look for an option titled Reboot to bootloader or Enter Fastboot . Select it to restart the device into Fastboot mode. Method 3: Using ADB Commands (Requires PC) how to open fastboot mode on oppo a37 verified
To prevent system bricking, data corruption, or loops into accidental factory resets, complete these steps before proceeding:
Type the following command to check if your phone is connected properly: adb devices (You should see a random string of numbers and letters followed by the word "device".)
Press and hold the on the right side of your device. Swipe the on-screen slider to turn off the device entirely. Wait about 5 to 10 seconds until the phone vibrates, ensuring all background processes have completely stopped. Step 2: Press the Fastboot Key Combination : Plug your phone into a computer using a USB cable
Oppo, like many major smartphone manufacturers, often restricts access to Fastboot mode by locking the device's bootloader. The bootloader is the low-level software that runs before the Android operating system; if it's locked, it will ignore any commands to boot into Fastboot mode.
If your hardware buttons are broken or unresponsive, you can boot into Fastboot mode using a computer via Android Debug Bridge (ADB). Step 1: Set Up ADB on Your PC
However, you can still prepare the device for modifications by using the official and a special key combination. As soon as the Oppo logo flashes on
: If Fastboot Mode is available on your firmware version, you'll see a screen displaying "FASTBOOT" text or an Android robot lying on its back. If you simply see the normal ColorOS boot animation and the phone starts normally, your firmware version does NOT support Fastboot Mode — proceed to Method 2 or 3.
: Some variants may use Volume Down + Power to enter a menu first, where you then select "Fastboot".
: OEM unlocking is essential if you intend to unlock your bootloader or flash custom images. Without this enabled, Fastboot commands will be rejected.
Keep holding Volume Up until you see a — that’s Fastboot mode .
If still connected to the computer, type fastboot reboot into your Command Prompt window and press Enter .