How do I register in Big Voize?
Big Voize is just a VoIP/SIP dialer, which means you will need a server IP address and username/password to log-in. These details are used in Asia and Eastern countries. However, you can contact the developer of Big Voize to learn how to obtain access to the service: firstname.lastname@example.org
App's official page: https://play.google.com/store/apps/details?id=com.bigvoize.app