A maintenance software update is now available for users who own a Sony Xperia M or dual smartphone version. The update doesnt change the Android OS version, Xperia M remains on Android 4.1.2 and Xperia M dual on 4.2.2, however there are several performance improvements and enhancements, UI and Camera tweaks, in the latest firmware thas already rolling out to above mentioned devices.
You’ll be able to install it via in OTA notification or through PC Companion Tool. Managed to install it? Let us know what has changed and how is the new firmare experience for you.
— Sony Xperia News (@SonyMobileNews) November 14, 2013