The journey from a dead, black slab to a fully functional Motorola Moto M running stable Android 7.0 Nougat is not complex—provided you have the correct with Sign Care authentication.
This indicates an issue with the scatter file or that you are using "Download Only" instead of "Firmware Upgrade." Error (8038): PMT address mismatch. Use "Firmware Upgrade." The journey from a dead, black slab to