Hi, I'm developing a iPhone app and when I configure the app to use TCP and no UDP since I want to get an incoming call, I'm receiving the following error: *ERROR: [0x3116000] AVAudioSessionPortImpl.mm:50: ValidateRequiredFields: Unknown selected data source for Port iPhone Microphone (type: MicrophoneBuiltIn)* >From my readings it seems that iPhone will only wake up from background mode only if using TCP. If I have both TCP and UDP configured I can make an outgoing call but still cannot receive a call. I want to do be able to do both. Cheers, -- Nguni Phakela -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20140404/0c304f6a/attachment-0001.html>