I've tried Owtalk for not a very long time but I soon fell in love with it. Now that I can make calls to my relatives and friends in Hong Kong and the Philippines and literally anywhere for free as long as they also have Owtalk. Amazing, isn't it?
It is so cost effective and convenient that my colleagues and business contacts soon switched to Owtalk Out and Owtalk In for business calls instead of traditional IDD. That's really a trend and revolution!