[paxys]

Yeah, this thing supports all popular apps, has Google Assistant, email, cloud sync..

I'd personally define "dumb phone" as one that doesn't use the internet at all, period.

[kreddor]

I agree. I guess if you have all those apps, but can't install any further apps, it's a "feature phone".

[jabbany]

But in this case you can. KaiOS actually has quite the plethora of apps available and because it has a modern browser engine, you can run modern web apps mostly with no problems (besides the limited resolution / memory).