The popularity dialer is a web service designed to simulate phone call:

With "The Popularity Dialer", you can plan ahead. Via a web interface, you can choose to have your phone called at a particular time (or several times). At the elected time, your phone will be dialed and you will hear a prerecorded message that’s one half of a conversation. Thus, you will be prompted to have a fake conversation and will easily fool those around you.

This is very useful to avoid or delay a meeting for instance. Of course this service will not improve communication. Here is a video demo: