Be warned: this is not a user-friendly "Settings > Update" process. The "UPD" files usually require you to unpack a ZIP archive onto a clean, formatted FAT32 SD card or USB drive. You often have to navigate to the factory settings menu (sometimes requiring a dealer code like 8888 or 3368 ) to trigger the update from the "File Manager" or "System Update" section.
. While often marketed as "Android 10," many of these units are physically restricted to older API levels (like Android 8.1 or Oreo) and use software skins to mimic newer Android versions. Firmware Identification & Compatibility 8227l Android 10 Firmware Download UPD
If your “Android 10” shows API 26 (Android 8.1), you have a fake version. The updated firmwares circulating as “8227l Android 10” are often custom ROMs based on Android 8.1 with an Android 10 skin – but they can improve stability. Be warned: this is not a user-friendly "Settings
In the context of Android head units, "UPD" is generally interpreted in two ways: The updated firmwares circulating as “8227l Android 10”