TeleTalk 3G. app for iPhone and iPad

TeleTalk 3G is a mobile app for VoIP platform that works as a terminal for making VoIP calls. It utilises SIP protocol and requires data service of GPRS/3G/4G network. This application is designed for VoIP service providers and end users. Service providers should provide their soft switch IP and port and he will get an operator code for his service. Customisable branded solution also provided for service providers. End user requires user name and password provided from service provider.
Features:
1. VoIP incoming and outgoing call via GPRS/3G/4G data service
2. Support full functional SIP to SIP call with local and remote ring back tone
3. Low band width consumption by customized byte saver solution
4. Synchronisation with phone contact
5. On screen call time display
6. On screen balance display
7. Call log 0f incoming, outgoing call and call from that log
8. Free to download but requires user name and pasword from provider