I've tried 2 Sony E headsets and a new moto one on this phone. The sound quality is dreadful on all of them. There is a sort od strobing effect and noise / screaching most of the time and the phone has to be fairly close to attempt anything near a decent call. People at the other end complain none stop. Is this normal for this phone? It makes the use of bluetooth headsets pointless at the moment. Another friend of mine has exactly the same problems.