Mobile phone costs in the US

So today I finally got my mobile phone service set up. And how mobile services are billed in the US is quite different than how it works in Sweden. The basic rule in Sweden is that if you do not make the call, you don't pay. That is, you pay nothing to receive calls and you pay nothing to receive text messages. The exception from the rule is if you're roaming outside Sweden. In that case you pay the costs for transferring the call/text to wherever you are.

This is not how things work in the US. Here you pay for incoming text messages as well as incoming calls... Always... So if I call/text my wife we have to pay for the communication twice... Actually that only applies to text messages since we have unlimited minutes because of the service plan we have but still... I don't get the logic behind this scheme. Maybe it's because I'm Swedish...