I answer Scott email about pjsua2 audio issue: I got the same issue with the provided samples, because the callback onCallMediaState is not defined in the MyCall subclass. Therefore the audio streams are not connected to the sound device. Just follow the example in the pjsua2 documentation (section "Working with Call’s Audio Media") and it should work: http://www.pjsip.org/docs/book-latest/html/call.html Thibault