DeX in my Samsung Galaxy S21 opened a new world. I enjoy the peace of mind that my phone can be a temporary substitute for basic productivity tasks if something goes wrong with my laptop.

Samsung Auto DeX is apparently Samsung DeX, which is hooked to Samsung Auto, not the other way around. The desktop mode needs to be enabled on the primary phone, not the head unit.

Samsung has delivered a revamped DeX experience in One UI 8 based on Android 16’s new desktop mode and, while most functionality is there, you might find some little tidbits that are different.

With the One UI 7 update, Samsung devices will no longer support the DeX app on Windows. First spotted by Android Authority, Samsung's UK website has been updated to note the app's discontinuation ...

“The DeX for PC on Windows OS will end support from One UI 7 version. We encourage customers to connect mobile phone and PC through the Link to Windows feature,” Samsung said on its website.

Samsung DeX for PC app. Samsung DeX window open on a PC. However, with the launch of One UI 7, Samsung discontinued the app and pushed users toward Microsoft’s Phone Link service.

For the best DeX experience, you need something like a Samsung Galaxy S23 FE costing around $230-$260 or the S21 Ultra costing $250+.