The more I use Skype on my iPhone the better both of them are.  This is one of those cases where the sum is better than the parts.  Here's a grest example: Yesterday I was at the banquet for my kids' ski at the Dartmouth Skiway in Lyme, NH.  This is rural New Hampshire with cell service at the top of the mountain only but there's great wi-fi in the lodge.  My phone rigns and it's a Skype call from my oldest daughter visiting family in New Zealand.