Viatalk Plus

Viatalk Plus offers a simple user interface and superb audio quality for smooth Voice over IP experience.Key features include:
- Bluetooth support.- Lowest battery usage with highest reliability / stability on google play.- Lowest latency of all android softphones.- Excellent audio quality, even on older devices.- Supports calling over WIFI/EDGE/3G/LTE- SIP stack fully compliant to RFC.- Background / multitasking support.- Integration with the native android contact list- Speakerphone mute and hold- UDP and TCP transports (use TCP for better battery life!)- Supports sending of DTMF- DNS SRV- Built-in echo cancellation- STUN support- call waiting