If your HONOR 90 is still functional and you have enabled Developer Options, you can open Fastboot Mode using a command line. This method is faster and more convenient if you are already working on a computer.
If this guide helped you open Fastboot Mode on your HONOR 90, share it with fellow HONOR users. For official support, always refer to HONOR’s service center or the HiSuite PC application for safe firmware repairs. How to Open Fastboot Mode on HONOR 90