Turn off your phone completely. Hold the designated boot key (usually Volume Down or Volume Up) and connect the phone to the PC via USB.

: Navigate to Settings > System > System Update on your stereo. If the head unit has an active internet connection, it may pull an official over-the-air update directly from the board manufacturer's server.

: Ensure the Spreadtrum USB drivers are installed on your computer so it recognizes the unit in "download mode." 4. Alternative: Online Updates

: Ensure all maps and personal data are backed up to an external SD card.

https://support.acme-embedded.com/downloads/sp7731e/firmware/1h10/SP7731E_1H10_FW_V1.0.3.bin

Budget tablets often come with aggressive adware. Flashing native firmware removes rootkits and persistent ads that antivirus apps cannot delete.

If the device is connected to Wi-Fi, it may find a newer "Native" or "Global" version automatically.