ViberVoiz

Vibervoiz iTel is the most happening mobile dialer in the telecom circles. It is a simple downloadable app that allows you to make VoIP calls from your mobile at low rates with best quality. It 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
Hold
Compatible with all SIP standard switches
Address Book Consolidation
Automatic Balance Consolidation
Jitter buffer implementation for smooth voice
Encourages use of silent suppression and comfort noise generation to reduce bandwidth usage
Auto detects contacts sourced from phone book
Thus,bettercall is a comprehensive mobile dialer that makes your VoIP calling effortless and enjoyable.