TP Smart is a mobile application for Windows Phone 8.x or above, offering VoIP Calls from data enabled mobile phones (2G/3G/4G or WiFi) to any landline or mobile devices around the world. Features: *VoIP Calls via Wi-Fi, 2G / 3G / 4G. *Works in all Countries and all Networks across firewalls. *Smooth voice quality. *Uses very less bandwidth. For End Users: You will be prompted for the following while starting the app: 1. Operator Code – Get Operator Code from your VoIP service provider. 2. User Name – User name is provided to end user by VoIP service Provider. 3. Password – Password is provided to end user by VoIP service Provider.