This is how I would solve the problem after just a minute of thinking about it: You may tap twice, and the iPhone makes a noise letting you know that the dial-

This is how I would solve the problem after just a minute of thinking about it: You may tap twice, and the iPhone makes a noise letting you know that the dial-pad is activated, at which point you can touch any square in a 3x3 grid of numbers, with a voice telling you which number you just pressed. A problem is if you're holding it upside down. If you're holding it upside down in your hand, the built-in orientation sensor would simply rotate the grid correctly. The less thinking a user has to do, the better. In other words, it could actually work better than the treo (another phone with a touchscreen), which you definitely can't use to enter a new number blindfolded with its tiny keyboard. And, you could hold the phone upside down and dial the same way, which no conventional phones let you do. A voice announcing the keys is a great idea, as well, since most phones use tones for keypushes. This would be great in an additional way, because whenever somebody tells you a phone number, they can follow along. "My cell is 111.2345. " "Ok (enters it on the iPhone, and a voice speaks each number.) One. One. One. Three. Four.." "NO, no, I said 2345."