Cell phone bills are expensive, and carrier contracts are binding. We need our cellphones, but that doesn't mean that we're not always looking for cheaper ways to make calls. Voice-over-IP services have come a long way in the last few years; Skype has perfected desktop-to-desktop calling, and Google has given us free VoIP domestic calling on Gmail -- talk over WiFi on email from the comfort of your couch. But, the next new frontier has become WiFi and VoIP calling on mobile. 
Source: http://feedproxy.google.com/~r/Techcrunch/~3/Bvh2501MXTQ/
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