Go to Settings > System Info (or About Device).

This process typically takes 5 to 15 minutes. Do not touch the screen or turn off the ignition. Reboot: The unit will reboot itself once finished. Step 4: Post-Update Calibration

Here is everything you need to know about finding, preparing, and installing an Alpha Coustic firmware update. Understanding Alpha Coustic Firmware

Format the drive to FAT32 . Most head units cannot read NTFS or exFAT.

Note your current MCU and Build versions before starting. Step 1: Locating the Correct Firmware

You may need to adjust the "Screen Resolution" settings in the hidden Factory Menu.

If the firmware arrived as a .zip or .rar , extract the files first unless the specific instructions for your unit say otherwise. Step 3: The Update Process