Hi Benny, your new CE sample does work fine, even in IMS environment. What remains is the problem with the voice quality (echotic, terribly loud, crackling etc. all in all poor quality). On the two WM 6 ASUS devices it seems to be impossible to make something other than "free speaking" run. This is not applicable, if run w/o echo canceller. With echo canceller the communication is some sort of half duplex. Regards