Power off the phone completely. Remove the back panel cover carefully.
The firmware version you are trying to flash may be older than the security patch level already on the device. Kirin devices have strict anti-rollback protection. Always flash firmware that is equal to or newer than the current version on the phone. hisilicon kirin 710 flash tool
Many websites bundle malware with flashing tools. Use only trusted sources: Power off the phone completely
If your Kirin 710 device can still access its stock recovery mode, you can use the official dload method without a specialized software tool: Kirin devices have strict anti-rollback protection
This is a third-party graphical interface that acts as a wrapper for official commands. It simplifies the process of unlocking bootloaders (if you have the code), flashing recovery images, and installing updates.
involve flashing "Board" firmware to temporarily enable fastboot oem unlock commands, which can circumvent the standard factory locks.