By now, many people are familiar with Voice over Internet Protocol (VoIP), a technology which allows radically cheap phone calls to be made via the Internet. Too often, though, VoIP calls require
clunky
technology or attachments, and so far it has been limited to fixed-line phone use. But this week, the Rebtel service, founded by Swedish entrepreneur Hjalmar Winbladh, who sold a previous start-up to Microsoft, is out to change that. Winbladh is bringing VoIP to mobile phones, and offering users a chance to slash the cost of their international calls.
For a fee of $1 per week,...
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