Just like any update there isn't an specific release date for each country/network http://www.sonymobile.com/global-en/software/phones/xperia-sp/ Latest available software You may already have the latest software, depending on the date of purchase. Software updates are released at different tim...
I stick with the ZTE Supreme for that reason - it has two radios so that I can use data and phone at same time - a must for my job (Network Engineer). Using Xposed and it's many modules basically keeps the phone current. And I really, really don't lik...