參考：http://www.xperiablog.net/2014/04/03/sony-to-release-new-kitkat-firmware-next-week-to-fix-sound-bug-for-xperia-z1-z-ultra-and-z1-compact-users/
原文：
Sony Mobile Communications would like to provide an update in response to reports around abnormal audio functionality and quality; that some users may be experiencing on their Xperia Z1, Xperia Z Ultra and Xperia Z1 Compact devices after upgrading to Android 4.4 KitKat.
We have identified this issue on some units of these models, and measures have been taken to swiftly deliver a solution for our users.
A fix for the issues will be included in a new software release that will start rolling out from next week (w/c 7/04), with exact availability and timing varying by operator and market.
簡單講，就是下周開始會發布修正聲音問題（從內部喇發出聲、而非外部喇叭）的軟體
不過 PTCRB 上還沒看到新版本？
http://www.ptcrb.com/vendor/complete/view_complete_request_guest.cfm?modelid=24844
chihliouma5 wrote:
請問Z不會再更新了嗎...(恕刪)
http://www.xperiablog.net/2014/03/19/sony-confirms-android-kitkat-rolling-for-xperia-z1-xperia-z-ultra-and-xperia-z1-compact/
KitKat will hit the Xperia Z, Xperia ZL, Xperia Tablet Z and Xperia ZR from the middle of Q2 2014 i.e. look for it in May
請繼續等到第二季
http://kheresy.wordpress.com/
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