ViViCall Phone is a safe, high quality , free VOIP software . ViViCall Phone have the leading mobile phone technology, voice quality and low rates,You can call landlines in 47 countries worldwide and 11 countries landline or cell phone. ViViCall Phone supports three ways Calling: Free Call, VOIP and CallBack , three kinds of call mode features are as follows :
[ FreeCall ]
Via wifi/3G/4G network connection between ViViCall users, make calls wherever and whenever with absolutely free! chat communication more easily.
【VOIPCall】
Via wifi/3G/4G network, based on the type of service Calling Plans can offer the lowest rates, make you more comfortable for calling to any countries around the world.
【CallBACK】
You can make calls as long as you have a network connection. Via GPRS/wifi/3G/4G, just use ViViCall Phone call to anyone, and enjoy the high quality calling results.

Features：
1，Free calls between ViViCall users.
2，Low cost.
3，Balance display
4，sync contacts list
5，Function with Hold, Mute, and Speaker
6，Take a small amount of bandwidth
7，High quality of voice, high rate of connection

Website : www.vivicall.com
E-mail : info@vivicall.com
Tel :852 -35,512,888

ViViCallPhone is based on PJSIP and CSipSimple