Nope, I don`t use beta clients.
Only thing different I have on steam ui is that I use PixelVision2, but that shouldn`t add tel no nagging on purchasing part.
it's optional? I can make purchases without adding phone number. Do you use the client to shop or web-browser?
(I only use browser because of Enhanced Steam - the client I only use as a launcher)
I was using the browser because it was already open, steam only is when using a game.
Then switched to client, same result.
Oddly, the nagging on client isn`t nagging for my number now, yet settings shows no number...