OZEKI Android VoIP SIP SDK
Build VoIP Apps for Android Mobile Phones in C#

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Android VoIP SIP SDK

Installation guide | Simple softphone

SMS Gateway Manual

Android VoIP SIP SDK - Quick Start

How to create an Android Softphone

Create test VoIP PBX system
Android softphone: SIP registration
Android softphone: Media handlers
Android softphone: Make calls
Android softpone: hold, hang up, redial, transfer
Android softpone: SIP instant messaging
Android softphone: Handling codecs
Android softphone: Simultanous calls
Android softphone: auto dialer
Android softphone: Predictive dialer
Android softphone: Multiline dialer
Android softphone: Ring Group
Android softphone: Call assistant

SMS Gateway Manual

Android VoIP SIP SDK - Quick Start

How to create an Android Softphone

Android VoIP SIP SDK features

Installation guide

Andoid voip sip sdk manual