Tech tends to move forward without looking back, but that doesn't mean new is always better. One feature that dominated mobile phones in the late '90s is making a comeback thanks to Apple, and you can take advantage of it on your iPhone when making calls. Text on 9 keys, known better as T9, is a predictive text technology that makes texting possible on old-fashioned phones with physical keypads. On these cell phones, letters occupy digits 2 through 9, with the 1 key used for punctuation, the number sign or pound sign key (#) as shift, and the star key (*) used as a space. Since you had to... more