Staunch International Inc presents a Private Mobile Network using a specialized Mobile Smartphone Application. Access to the Internet is required with about 1.5GB of available Data per month when using 3G services (Based on an average use of 30 minutes a day), or use a WiFi network where possible to make Very Low local and International calls when calling Non-Staunch Talk subscribers. All Subscribers are issued with a unique SIP number that can be used to make FREE calls between other Staunch iChat members. Voice quality with Staunch iChat is generally comparable to or better then other SIP services, our switching platform is customized to operate efficiently over Wifi & 3G networks. For further information please visit: http://www.staunchinc.com/ NOTE: This application has been tested to work with Version "3.1" or newer Operating systems,The application has been tested to work with version "4.X" operatins sytems as well.