After the flash, do not reboot . Navigate to "Wipe Data/Factory Reset" and "Wipe Cache Partition." This prevents boot loops caused by old config files.
If your car has a factory amp, you'll need to properly connect the AMP-CONT wire, or you'll get a loud pop when turning the unit on/off. android f9212a00017v001 exclusive
: Updating these units usually requires an "Online Upgrade" through the system settings or a "Local Upgrade" using a USB drive with files specifically for the F9212A board. After the flash, do not reboot