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The unique free SIP Softclient with Top Audio Quality for the iPhone/iPad/iPod Touch! Media5-fone is the best and most comprehensive Mobile VoIP SIP Softphone application that enables you to make and receive free or inexpensive phone calls over the Internet using Wi-Fi or 3G connection. Get a VoIP SIP account with one of the validated SIP Providers and use the Media5-fone SIP Client to start making and receiving calls all around the world. Compatible Enterprise IP-PBX & SIP serve