Official and community-made firmware can often be found on platforms like GitHub (Allwinner-t3-p1-firmware) or specialized forums like How to Update: Download the update.zip update.script files to the root directory of a FAT32-formatted USB drive. Insert the USB into the head unit. Navigate to Car Settings Factory Settings (common passwords include ) and select System Update

: Check the website of the brand that sold you the head unit (e.g., Joying, Hizpo, or Dasaita). They often provide specific update packages tailored to their hardware configuration.