Can you provide the specific "MCU version" and "Build number" from your unit's settings?
: High-quality brands like Joying Auto provide official firmware repositories for their specific hardware versions. 8227l android 12 firmware download
: Some technical guides on YouTube provide links to specific 8227L firmware versions in their descriptions, though these should be used with extreme caution. Installation Procedure Junsun 8227L Android CarNavi firmware update Can you provide the specific "MCU version" and