Xperia Blog http://tinyurl.com/prqt3dm
Android 5.1.1 rolling to older Xperia Z series (10.7.A.0.222)
2015/09/07
The older Sony Xperia Z series is now seeing the Android 5.1.1 Lollipop
firmware start to seed in the form of build number 10.7.A.0.222. At the time
of writing, we have noticed the update land on the Xperia Z (C6602, C6603
variants), Xperia ZL (C6503, C6506 variants), Xperia ZR (C5503 only) and
Xperia Tablet Z Wi-Fi (SGP311, SGP312) and Xperia Tablet Z LTE models (SGP321
only).
Looks like the Stagefright exploit has not been fully patched in this update.
We will attach some FTF firmware links in this post in due course, but in the
meantime, if you have installed the update, let us know your initial
impressions below.
心得:2013年的Xperia Z系列真的也可以拿到Android 5.1.1的更新，SONY真的太佛心了吧!
不过Stagefright还没有完全修复(看其他网站用app检查，还有一项安全漏洞未修正)，
然后Z1和Z Ultra的5.1.1更新好像还需要等等。
根据另一网站的报导(http://tinyurl.com/pwmu5t2)，Xperia M4和M5的5.1.1更新似乎也
快要推出了，看之前各机型更新5.1.1的改善，这应该颇值得期待吧!