You can set up your Iphone to automatically connect to a network under "Settings", so that you don't have to think about it when you are at home. ATT is $15. for 200 MB or $25. for 2GB. There is no unlimited option anymore. Verizon is $15 for 150 MB, but we are not sure yet what they will charge for Iphone usage. They currently offer unlimited for Droids, etc.