Why use WiFi when I already have internet access? Simply put - SPEED. Chances are, your internet experience when using WiFi will be significantly faster than on any of the carriers' regular broadband cellular networks. In addition, some of the WiFi networks may be available in places where there may be a poor cellular signal to begin with. So if you have a qualifying service from AT&T, Verizon, or Cablevision why not contact them and get setup for your free WiFi access? You never know when it will come in handy.
More and more cities across the United States are deploying their own wireless networks to offer public safety personnel and public works employees remote access to their municipal data network.