VocalTop

Vocaltop is feature-rich mobile VoIP application for making long distance or international calls at low rates. It is an interesting find for end users who have their friends and families scattered all around the world. The mobile application is available on the widely popular Android . So, end users can easily download the application on their favorite device and use VoIP services to get started.
App Highlights:
Processes calls even in low bandwidths
In-built noise and echo cancellation
G729, PCMU, PCMA codec compatibility
SIP softswitch compatibility
Address book integration
NAT traversal on Private IP
SIP Signaling
Download Vocaltop now to make VoIP calls to your near & dear ones.