Modern Phone Stand

I wanted a stylish little phone stand, something modern looking with angles. I made this guy! I'm going to make a larger version for tablets soon.

Unfortunately phones can slide off sideways easily if this is on a slope, I haven't figured out how to solve that yet (maybe rubber or tape? i was thinking electrical tape). Or some texture I can make on the surface.. Unless you have a rubbery case in which case (lol) you're fine.