Would that be asking for too much? Got a display that has an HDMI type A plug. Also a USB keyboard and a wireless USB mouse. Will consider buying a new mouse and keyboard if necessary.

Isn't that kindof standard on modern Android devices?
I believe both would be added wirelessly.
Let loose your search-fu!

It's all available, with the right adapters. Androids can easily cast video to chromecasts and other similar devices, and can accept bluetooth mice and keyboards. Your favorite search engine will find more info for you. I don't know that Apple devices can do any of this, meaning I just don't know because I've never owned one. But Android has had the capability for a long time.

As there are allegations of severe security problems with bluetooth (your entire system can be hijacked by just having bluetooth on), I would rather have it disabled. Can't you plug a USB hub, a USB mouse and a USB keyboard to the USB port some smartphones have?

If anyone's interested, here's an intro to bluetooth's security issues:

https://www.foxnews.com/media/blueto...y-experts-warn

The bluetooth security issue has been fixed in all kernels that I know of, Debian in particular. That link is long outdated. But yes, with the proper USB on-the-go adapter and a USB hub, most Android phones can be connected to peripherals via cable. But it's a pain in the rear. Bluetooth and wifi are far better, and secure since early October.

You can get a Samsung model and use a usb c to multi device. HDMI out and usb inputs.

DEX for linux has been dropped so....

A smartphone can be connected to a laptop with a USB port to sync that way - done it with an old android smartphone. Therefore a smartphone's USB functionality is that of the client or whatever the term is in USB. Does it follow that you cannot use just any usb c to multi device but it has to be one that allows two clients to talk to each other? And that is what a USB on-the-go adapter does?

That's worrying. Any links with instructions tested on a specific smartphone?

It depends on the phone. Some phones are USB hosts, some are not. So some need an OTG adapter, some don't. My Pixel3 has a Type C USB port, and it works without an OTG adapter, but it does require an adapter to attach USB A devices, and that was included with the phone. The real pain with using cables is the cables. I don't like having cables lying around. Cables are so 20th Century. For instructions, you need to research each individual phone, and I don't have the incentive to investigate that in depth, so I leave it as an exercise for the reader. I will say that the Pixel series from Google are my choice of phones. I get regular security updates, which I don't get from other manufacturers. My wife's Samsung phone has never received a single update, although I check it regularly. Google updates monthly, every month. I can cast anything to a chromecast or smart tv, and bluetooth peripherals work. But I seldom do it, because I have other devices that do it better. YMMV.