UMcall Internet-based free calls and send and receive messages, software, network 2G/3G/WiFi, the two sides can be installed call.
1, permanent free, save calls
Free internet voice calls and send and receive messages, regardless of domestic and international long distance, download and install can be ultra-low flow consumption per second 1.5KB per hour 5MB or so.
2, the ultra-high voice codec technology
Leading global provider of voice codec technology, two-way 1.5K / S bandwidth can, adapt 2G/3G/WiFi network.
3, real-time two-way communication, intercom mode
Silence detection, echo fiction, jitter smoothing, delay fill vacancies and other technology to achieve a two-way real-time call, to distinguish it from the intercom mode.
Tags: free call software , free calling software , umcall , 2g network calling softwer , free voice calling software through network , to free calling software