This short tutorial will take you through the steps to enlarge the font size on your iPhone or iPad (and iPod Touch) to make the text easier to read.
Note: this will not increase the size of the ‘keyboard’ on your iPhone/iPad, nor will it enlarge the Home Screen icons. It will increase the size of the font that’s used by the following Apps: Mail, Contacts, Calendar, Messages (SMS/TXT/etc) and Notes.