Mobile phones and “smart” phones have a ton of features: things like taking pictures, browsing the Internet, and playing games. Studies have shown, however, that only somewhere between 10 and 50% of the users of these feature rich devices know how to do more than make phone calls with them. Rich Miner of Google mentioned recently that the reason for this is mainly “bad UIs”. I think, however, that Rich is probably on the wrong track, at least for some users. Maybe even the majority of them.