my lg g4 f500l h811 phone is dead after mistakingly flash its different firmware to the phone. The phone does not boot again download mode to rewrite the backup firmware of the phone. Meaning i read the backup firmware with umt box and save it before flashing another firmware to the phone which render it dead. Please i need help to revive this phone. The phone now display hs-usb 9008 scan port. Please i need help.