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Try to install latest What's New by refreshing Software Update and report us if everything has been solved
If u don't see new update for What's New (3.5.A.0.0) then see here http://www.apkmirror.com/apk/sony-mobile-communications/ and ASAP u should find it there at first line !
Once u install this one, then see if something has been solved and so we can see to solve 