Use this method if your phone is currently powered on and you have a computer.
OPPO has historically restricted Fastboot commands on many of its ColorOS devices, including the F9 series. While you can enter a mode labeled "Fastboot," the device will likely reject standard commands like fastboot flash or fastboot boot unless the bootloader is unlocked. This mode is primarily used for system updates via a PC.
Exiting Fastboot Mode on OPPO F9 is a simple process: How to Open Fastboot Mode on OPPO F9
This is normal for OPPO F9. The screen may turn off entirely, but the phone is still in Fastboot. Connect to your PC and type fastboot devices . If you see a device, ignore the black screen. Proceed with your flashing commands blindly.
To open Fastboot Mode on an , use the hardware button combination of Volume Up + Power . ⚡ Method 1: Hardware Button Combination Use this method if your phone is currently
: The OPPO F9 uses a MediaTek (MTK) processor. In some MTK devices, entering Fastboot can be tricky because the bootloader might be locked or hidden by the manufacturer.
A: No, simply entering Fastboot does not wipe data. Only commands like fastboot flashing unlock or fastboot oem unlock will trigger a factory reset. This mode is primarily used for system updates via a PC
If your physical buttons are damaged or you're already working on a PC, you can use the ADB and Fastboot Tools Enable Developer Options Settings > About Phone Build Number 7 times until you see "You are now a developer". Turn on USB Debugging Settings > Additional Settings > Developer Options and toggle on USB Debugging Connect to PC : Plug your phone into your computer via a USB cable. Run the Command