: Sometimes issues are related to the Microcontroller Unit (MCU) rather than the main Android OS. You can often check for MCU-specific updates in the same Factory Password
Since these units are often customized by different distributors (like P.A. Navigator or Shopee retailers), the most reliable way to get a specific firmware file (usually an update.zip 0;6ec; or .img file) is to contact the store where you purchased it. They can provide a private download link (often via Google Drive or Dropbox) tailored to your specific hardware build. 0;404; alpha coustic mp1769 firmware link download
If you need to access hidden developer or factory settings to initiate an update or fix errors: : 8888 , 3368 , or 000000 . : Sometimes issues are related to the Microcontroller