Can you use an iPhone 5 to call if you have internet service, but no cell service? I have an iPhone 5.  The place I'm moving to has a wi-fi network in place, but there's no cell service (it's in the mountains).

Is there any way to use my iPhone to make/receive calls over the wi-fi network?  I'd like it very much if people can still call me while I'm at home.
Assuming the WiFi connection has enough bandwidth for audio, you could install Skype and use SkypeIn/SkypeOut to be reachable via a phone number.