I have an iPhone, but I mainly use it for calls, texts, and an occasional game of Words with Friends.  But after seeing this list, I can't wait to give these features a try.

I recently saw a tech article that demonstrated 15 simple iPhone features of which not many people are aware. I think my favorites are how to keep the all caps feature permanently on while texting, how to use your iPhone as a level, and how to get Siri to tell you which airplanes are in the skies in your area.