I have dreams with phones all the time. I dream that I type something, I look at the keyboard for a second, and when I look back at the text box I realize I made a mistake and have to rewrite most of the text.

It helped me realize I already experienced a quirk of the brain while dreaming, that I found about some time after I started having this recurring dream: if you look at a text while dreaming, then you look away and then back at it, the text will change.