iSmartPhone Mobile Dialer is a mobile app that enables VoIP calling mobile phones. It makes app to app unlimited calls with no charges
Main Features of iSmartPhone Mobile Dialer Express:
• Make free calls with HD sound quality.
• Viewing call logs and making calls from call logs.
• Receive calls from other SIP clients.
• Speakerphone, mute and hold functions.
• Audio codecs include G.711a/u, G.722(HD), iLBC, GSM, OPUS, SPEEX.
• Automatic codec selection to ensure optimal call quality
G.729 Audio Codec
• Provides excellent audio quality.
• Ideal for connections with limited bandwidth, such as 3G.
• Reduces the amount of data used during a call.
Users will get account from the http://www.antisip.com/sip-antisip-com-register Registration is Completely free and it will not take more than two minutes. Enjoy the iSmartPhone :-)