Phone calls are privileges!  Prisoners should be allowed only collect calls.  When you commit a crime and are sentenced to prison, you should be taking the time to reflect on what you did and what you can do so you don't end up in prison again.  Phone calls, television, cigarettes, and other luxuries afforded to law abiding citizens should be cut off to prisoners.  

Educational books, religion, and teachings on becoming better citizens should be provided.  Teach them a trade so they become efficient and can easily get jobs when they are released.  Cut out the luxuries that cause them to forget that they are in prison and not on a vacation!