You cannot use ADB without enabling USB Debugging first.
| Issue | Solution | |-------|----------| | Buttons don’t enter Fastboot | Try (some variants differ) | | Device not detected in fastboot | Install HONOR USB drivers / use original USB cable | | “Waiting for device” in ADB | Check USB debugging & re-authorize PC | | Fastboot mode freezes | Hold Power for 20 seconds to force restart | How to Open Fastboot Mode on HONOR Pad X9