Developer's DescriptionBy Royal Bd NetworkBlack Diamond (HD) Platinum Dialer is a mobile app for Android and other smartphones, offering a range of functionalists like VoIP Calls...Black Diamond (HD) Platinum Dialer is a mobile app for Android and other smartphones, offering a range of functionalists like VoIP Calls, cross-OS Instant Messaging, automated Calling Card usage and much more from data enabled mobile phones (3G/4G or WiFi).For using this app, end users will need an Operator Code, which they can obtain from a VoIP Service Provider.