This button combination is valid for all Huawei and Honor devices such as Huawei Mate 20 Pro, Huawei Mate 10, Huawei P20, Honor 8, Honor 8 Pro, Honor 9, Honor 10, etc.
- Fastboot mode
- Power off the device.
- Press and hold Volume Down + Power button. Alternatively, you can also press and hold the Volume Down button while connecting the device to a PC using a USB cable.
- Recovery mode
- Press and hold Volume Up + Power button while the device is powered off.
- Release the buttons when you see the Huawei/Honor logo