VoIP SIP SDK for iPhone is a customizable solution to develop your own softphone for iPhone and iPad devices. The softphone suits needs of most users and provides the following functionality:
- video and voice calls;
 - iOS 5, 6, 7 support;
 - changing camera orientation;
 - switching between multiple cameras;
 - background mode support;
 - sRTP support;
 - text chat;
 - status update (presence);
 - DTMF support;
 - customizable;
 - works with most SIP servers, including ABTO SIP Server and Asterisk;
 - works great with most sip clients including VoIP SIP SDK for Windows.
 
System requirements of VoIP SIP SDK for iPhone: iOS 5
