Herofone

Hero fone is a mobile application, which allows users to make VoIP calls from mobile phones. For using this app, end users will need an Operator Code, which they can obtain from a VoIP Service Provider.
Features:
Integration with mobile phonebook
Balance information: You can check their account balance on the mobile phone screen or alternatively, they can hear account balance information through IVR (Interactive Voice Response).
Hero fone Plus supports 3G/4G, GPRS and Wi-Fi for internet connectivity.