Reverend Mosley's Trapped In The Closet Book Audio (lost phone recording; 2012)
Trapped in the Closet is a 33 part hip-hopera created by R. Kelly. The first batch of chapters were released in 2005 with 10 more coming out in 2007 and 11 more in 2012. Written and produced by R. Kelly, the series tells a story of a one-night stand which sets off a chain of events, gradually revealing a greater web of lies, sex, and deceit.
The plot of chapter 29 is Reverend Mosley is trying to sell his new book called "Trapped in the Closet." After the advertisement is over, Tina and Roxxane get into a fight resulting in Tina leaving.
While the advertisement for Reverend Mosley's book is playing, the phone number 312-380-6596 is shown on screen. This turned out to be a real phone number you could call and receive a special message (performed similarly to a chapter from Trapped in the Closet) from him explaining that his book is all sold out.
Calling the number today results in a call that cannot be completed. It's unknown if they plan to do something else with the number, but for now it doesn't do anything.