There’s no official tool called “Fastboot Reader.” The term likely refers to:
The primary purpose of Fastboot is to write (flash) or read system partitions. fastboot reader huawei honor
If your Huawei/Honor is stuck in a bootloop and eRecovery fails, a Fastboot Reader can: There’s no official tool called “Fastboot Reader
This is Huawei’s proprietary tool used by service centers. It acts as a Fastboot reader by switching the phone into "Com 1.0" mode (a deep engineering Fastboot). fastboot reader huawei honor
To save your current boot.img before modifying:
fastboot_reader oem read-partition boot boot_backup.img
The reader copies the raw binary data from the eMMC to your PC.