When we talk about using cell phones in class, we’re not just talking about using cell phones in class.
"In the most ideal class settings, mobile devices disappear into the background, like markers and whiteboards, pencil and paper – not because they’re not being used, but because they’re simply tools, a means to an end. The “end” can be any number of things: to gauge student understanding of a concept, to capture notes and ideas to be used and studied later, to calculate, to communicate, to express ideas."
I think using cell phones as learning tools could go well if they are used in a meaningful way. Since my students are likely going to be too young to own cell phones, I probably won't be able to do this, but it is interesting none the less.