Sony has just fixing some bugs on three devices Xperia Z series such as: Xperia Z1, Xperia Z Ultra, and Xperia Z1 Compact. Firmware 14.3.A.0.757 take and will replace the old firmware with version 14.3.A.0.681.
Sony fix the sound problem that has been plaguing users of the handset where the sound comes from the internal speakers instead of external speakers.
This update will be released in stages in several regions of the world. However, in some countries such as: UK, Germany, Russia, France, China, Israel, Poland, Sweden, Austria, the Philippines, the Netherlands and Slovakia have already got it first. With all the changes made by the sony hopefully it will be better than ever.