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The Rebtel Voice Platform makes it easy to add VoIP calling in any Android or iOS app: - Quick to start: Make your first VoIP call from within your app in a few minutes. Free to start. - Easy to use. Add VoIP calling in your app with a few lines of code. No need to understand VoIP protocols like SIP or WebRTC media handling. - iOS and Android. Both platforms supported. - HD voice quality. Excellent call quality over 3G or Wi-Fi. - Well supported. Code examples, step-by-step instructions and documentations for iOS and Android available on - Proven. Technology used by millions of Rebtel users.