Mobile phone maker based in Japan , Sony Mobile , has confirmed some time ago that they plan to provide the Android operating system upgrade to version 4.4.2 KitKat to some of the Z series Xperia , Xperia ZL and ZR Xperia . The upgrade is said to be made in Q2 2014 .
Quoted from Softpedia , shows its seriousness in providing upgrades to some of the Z series Xperia , Xperia ZL and ZR Xperia , Sony even has updated the product page at Xperia Blog for all the mobile phone , add a caption " May 2014 " as the release period to upgrade the platform KitKat Android OS v 4.4.2 for the Xperia series .
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Unfortunately , the Sony does not provide specific information about the release date of the update , so it looks like users will have to wait a few more weeks to receive the following information , or it could even reach the end of May 2014 . Likely, Sony will make an official announcement of the availability of the release of the new platform as soon as it is ready roll - out , so that users ie Z Xperia series , the Xperia ZL and ZR Xperia can immediately install .