[Moto G6 Questions & Answers] Ragarianok:
[MENTION=9745802]Alyctro[/MENTION]

DUDE, YOU HAVE A MOTO G6

PLAY

.

Try the RETAIL firmware listed here:

https://mirrors.lolinet.com/firmware/moto/aljeter/official/

If you're trying to relock the bootloader, which should fix the "bad key" message, follow this:

fastboot oem lock
fastboot oem lock
fastboot flash oem oem.img
fastboot flash system system.img_sparsechunk.0
fastboot flash system system.img_sparsechunk.1
fastboot flash system system.img_sparsechunk.2
fastboot flash system system.img_sparsechunk.3
fastboot flash system system.img_sparsechunk.4
fastboot flash system system.img_sparsechunk.5
fastboot flash system system.img_sparsechunk.6
fastboot flash system system.img_sparsechunk.7
fastboot flash system system.img_sparsechunk.8
fastboot flash system system.img_sparsechunk.9
fastboot flash vendor vendor.img_sparsechunk.0
fastboot flash vendor vendor.img_sparsechunk.1
fastboot flash boot boot.img
fastboot oem lock
fastboot getvar max-sparse-size
fastboot oem fb_mode_set
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash modem NON-HLOS.bin
fastboot flash fsg fsg.mbn
fastboot flash dsp adspso.bin
fastboot flash logo logo.bin
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system system.img_sparsechunk.0
fastboot flash system system.img_sparsechunk.1
fastboot flash system system.img_sparsechunk.2
fastboot flash system system.img_sparsechunk.3
fastboot flash system system.img_sparsechunk.4
fastboot flash system system.img_sparsechunk.5
fastboot flash system system.img_sparsechunk.6
fastboot flash system system.img_sparsechunk.7
fastboot flash system system.img_sparsechunk.8
fastboot flash system system.img_sparsechunk.9
fastboot flash vendor vendor.img_sparsechunk.0
fastboot flash vendor vendor.img_sparsechunk.1
fastboot flash oem oem.img
fastboot erase modemst1
fastboot erase modemst2
fastboot erase cache
fastboot erase userdata
fastboot erase DDR
fastboot flash fsg fsg.mbn
fastboot oem fb_mode_clear

Otherwise, this should work, but you'll still get "bad key" message when flashing boot.img and recovery.img (this is due to the bootloader being unlocked):

fastboot erase userdata
fastboot erase cache
fastboot erase modemst1
fastboot erase modemst2
fastboot erase carrier
fastboot erase DDR
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash oem oem.img
fastboot flash logo logo.bin
fastboot flash dsp adspso.bin
fastboot flash modem NON-HLOS.bin
fastboot flash fsg fsg.mbn
fastboot erase modemst1
fastboot erase modemst2
fastboot flash system system.img_sparsechunk.0
fastboot flash system system.img_sparsechunk.1
fastboot flash system system.img_sparsechunk.2
fastboot flash system system.img_sparsechunk.3
fastboot flash system system.img_sparsechunk.4
fastboot flash system system.img_sparsechunk.5
fastboot flash system system.img_sparsechunk.6
fastboot flash system system.img_sparsechunk.7
fastboot flash system system.img_sparsechunk.8
fastboot flash system system.img_sparsechunk.9
fastboot flash vendor vendor.img_sparsechunk.0
fastboot flash vendor vendor.img_sparsechunk.1
fastboot erase carrier
fastboot erase userdata
fastboot erase DDR
fastboot erase cache
fastboot reboot