I use RProperty::Set( KTelephonyAudioOutput, KTelephonyAudioOutputPreference, EPSPrivate/EPSPublic ) API to route audio between ear piece and loudspeaker in active cellular call for S60 3rd Edition MR/FP1. This API is working fine in normal use. But using the same API with bluetooth headset, the audio is not routed to loudspeaker from headset internal speaker and no error is returned. I tested the scenario with sample found in this link - http://wiki.forum.nokia.com/index.ph...he_loudspeaker.

Is this a known issue of cellular call audio routing with bluetooth headset? Is there any other method available to route audio between ear piece/headset and loudspeaker?