I only hear audio out of left headphone,the right audio channel does not work. This confirmed by a Service mode Sony Ericsson Xperia (*#*#7378423#*#*). The above issue affects a set of high quality earphones I used to exclude a link of this fault to my brand new original SE Xperia earphones. A ring-tone speaker and the audio jack were replaced for the new parts but those did not resolve the problem.