If everything looks good, you’ve successfully upgraded!
Check the barcode sticker on the top or side of the unit. Common prefixes: CPU: PX5 , Platform: AC8257 , or Model: YT9218 . Enter those instead. dmhz5350bt firmware update link
Firmware links disappear when manufacturers discontinue products. If you get a 404 error or broken domain, use these : If everything looks good, you’ve successfully upgraded
If your unit is branded, check the manufacturer's site directly. Look for a "Support" or "Download" section. If everything looks good