It seems problem 2 and 3 (setting kAudioSessionProperty_OverrideCategoryEnableBluetoothInput returns kAudioSessionUnsupportedPropertyError and AudioCategory is set to <null>) is caused by building for old iOS. pjsip is always built for iOS 2.0. Should it really be that way? Setting $CFLAGS before running configure-iphone solves it: CFLAGS="-O2 -Wno-unused-label -D__IPHONE_OS_VERSION_MIN_REQUIRED=30103 " -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20101021/55f9966b/attachment.html>