Byefone

Byefone is the most happening mobile dialer in the telecom circles.Byefone is a simple downloadable app that allows you to make VoIP calls from your mobile at low rates with best quality. Byefone works on all Android supported devices with limited internet connectivity via 3G/Edge/Wi-Fi, etc.
The features attached to this dialer give you a rich content for making VoIP calls. VoIP Providers can leverage this app to further their business by connecting to larger user base.
Top Features:
Uninterrupted call connection even in low bandwidth areas
Supportive to codecs : G729,PCMU, PCMA
Latest UI
Loud Speaker
Real-time SIP status messages
SIP based protocol for Signaling
Improved Call History
Works past NAT or Private IP