The problem with this is twofold: 1. There isn't much to touch on a screen except the screen. On a keyboard, some keys are different sizes and we often have a

The problem with this is twofold: 1. There isn't much to touch on a screen except the screen. On a keyboard, some keys are different sizes and we often have a key that allows us to know proper finger placement (mine is j and f: I've used keyboards with a dot on d and k too). 2. Cell phone layout isn't as standardized as a qwerty keyboard. Sure, the letters are in the same spot, but symbols aren't always there. We have other methods to quicken touch screen typing, though: Swipe-friendly keyboards and predictive text.