The most common way to enter Fastboot mode is by using your computer's command line after connecting your phone.
If you plan to send commands to the phone, install the latest HONOR USB Drivers and Android ADB/Fastboot binaries on your Windows or Mac computer. How to Open Fastboot Mode on HONOR 200
You now have three distinct methods to get into your HONOR 200's Fastboot mode: The most common way to enter Fastboot mode
Modifying system partitions via Fastboot often requires wiping the device. Always back up your photos, contacts, and important files to a cloud service or an external drive before proceeding. How to Open Fastboot Mode on HONOR 200