After a long communication with Sony and explaining stuff to them apparently these are known FIRMWARE flaws. To answer Samuel's question you use the microphone in video camera. What happens is there is a 2 second lag and the video camera says "unknown error" and crashes. Voicesearch, notes microphone etc do not work in my and alot of other people's Xperia Z's. What annoys me is that SonyMoible support say repair your phone etc which is hopeless advice as there is a flaw in the firmware. The flaw is defintiely in 434 firmware which the only firmware available to UK to owners of generic Xperia Z's. The only solution is to do a factory reset and turn off all app updates. The whole thing is a joke this phone is the complete opposite of a smartphone.
Tom
