If you have a Sony Xperia Z you should receive a notification for an update being available for your phone. According to official wording from Sony, it should bring you improvements to the phone’s Bluetooth connectivity and battery. Alongside other fixes, bits should also refer to a new YouTube app, and some other behind the scenes improvements.
The same goodies should also be available for the Xperia ZL and ZR phones, so make sure to check that update notification. If you have an Xperia Tablet Z, the refresh will start rolling out sometime this week (or the next, if your week starts with a Monday) — week 7 — so keep an eye out for that. According to XperiaBlog, we’re looking ahead at build version 10.4.1.B.0.101, which will be still Android 4.3-based.
firmware rolling for #Xperia Z, ZL & ZR (Tablet Z eta next week) – brings BT connectivity, battery, YouTube app improvements & more
— Sony Xperia News (@SonyMobileNews) February 7, 2014