There are a lot of cool things you can do with the iPhone keyboard, like turning it into a trackpad or using a multitude of gestures to optimize your smartphone experience. That is, of course, when ...

A closeup picture of a phone keyboard. The acronym T9 stands for Text on 9 keys. T9 "predictive texting" is a tool used primarily on non-smartphones (those with just a nine-key keyboard similar to a ...