I was pissed off with the 630 not being supported, but then I remembered that my Windows devices have actually got more updates than the Android ones and got a 650 to keep playing with UWP.
I have a 640 with a smashed screen for testing. I'm liking it enough lately that I'm tempted to drop the €40 for a new screen.
One thing I've noticed is that the voice recognition is not as good as it was on the WP8 SMS app. I love that I can use it anywhere now, don't understand why it's taken a backward step in accuracy though
It is there for Windows Phone 10.