They mean: Unlimited WiFi usage. Since EVERYTHING is routed through wifi whenever possible, you can call, text, browse without any alternative usage patterns.

They mean: Unlimited WiFi usage. Since EVERYTHING is routed through wifi whenever possible, you can call, text, browse without any alternative usage patterns. Also no overages. However if you are a very heavy user, they will terminate your contract in favor of just directing you to another plan. Here's the kicker: This may be good enough for say 30% of people. So why not. It may not be for you, or it may.