The most common source for base firmware files. Link: XYAuto File Server Login Details: UserID: Xyauto | Password: 123456
: It is highly recommended to back up your current stock ROM using tools like the SP Flash Tool before attempting an update. Junsun 8227L Android CarNavi firmware update mtk 8227l firmware link
Never turn off the ignition or disconnect power during the update process, even if the screen stays black for a long time. The most common source for base firmware files
: Copy the firmware file (often named update.zip or similar, do not extract it) to the root of the USB drive. Trigger : Plug the USB into the head unit. mtk 8227l firmware link