After now fully transferring my phones and associated devices over to my 3CX server I'm now playing with 3CX Android on my HTC Desire as an option instead of forward to mobile/voicemail on no answer. However I've run into an issue where I can hear everything the external party says but they cannot hear me. If the call comes from an internal source like a deskphone attached to the 3CX server than the audio is full duplex without any issues. So given that internal is fine and external has issues it must be a server setting I'm not seeing. Is anyone able to shed some light on this issue? I've done a little bit of Google'ing on it but other than finding others with the same issue I've come up empty handed.