UMcall free call software

UMcall Internet-based free calls and send and receive messages, software, network 2G/3G/WiFi, the two sides can be installed call.
Features:
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 calling software for android, umcall, android to android free calling software, android free call software, android free calling software.