A. If most of your wireless usages are on Wi-Fi (who isn't?), you have the potential to cut your wireless bill to $0, thanks to some of the innovative Wi-Fi-centric wireless service providers (they are all MVNOs - mobile virtual network operators, meaning they lease the wireless network from a mobile network operator).
The downsides?
- The handset selections are limited
- Not available everywhere yet - sign up and wait patiently ...
But the wait could save significant amount of money, especially if you travel overseas ...