Open up the iPhone to all developers, and here’s what you get: iRetroPhone, a clever but questionable software application soon to be available in the iPhone App Store. Along with the realistically cumbersome experience of a rotary dialer, its sound effects are equally convincing.

This particular dial not exactly like the one at Grandma’s house? Developer ObjectGraph will also release a custom skinning application so you can create your own dials. This app might be fun as a joke, but we can’t imagine actually using it for real. Take a look at a video of the software in action:

ObjectGraph, via Unpluggd