This is a Winterboard theme that replaces the stock dialer with the look of a pay phone. It will work on the iPhone 4, 4s and 5. It is compatible with iOS 4.0 through 6.1.2.
Download the theme in Cydia, launch Winterboard, apply the theme and respring. *Thanks to ZebSogo whose original Retro Dialer was used as the basis for this theme. Another thanks to DanDan for helping me iron out the kinks in this theme.