> My friend, there are a lot of icons in every program. When the smart developer relies on the stupid user (emphasis mine) to guess what he wants without bother

> My friend, there are a lot of icons in every program. When the smart developer relies on the stupid user (emphasis mine) to guess what he wants without bothering to put a text label or a tooltip describing the role of the button don't expect wonders. And since "material design" it is really difficult to say if an UI element is a button, or a label or just a decoration without clicking on it and opening the Gates of hell. I'm loathe to disagree but at this point, the phone icon is like the icons for designating Men and Women's restrooms. It's practically universal. It's the icon you use to open your phone app on your phone.