Landlines and payphones are dying for a reason - they're relics of the Analog Age.
In this Digital Age, Voice is just another application. We now use freemium services like Skype, Google Voice, and numerous other VoIP services on a regular basis. Even modern-day PBXes use VoIP to carry voice.
So why not use VoIP with the Reinvented Payphone?
And even provide it for free! Perhaps, users can place a one-minute audio call for free by viewing a short ad. And should they want to have Times Square in the background, have a teleconference option for a nominal amount.