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Xperia Z Ultra sold out with a firmware version is not complete and lacks many features as introduced by Sony , not sure why companies do this , but at least now users are eagerly waiting for a

Xperia Z Ultra users began receiving 14.1.B.1.510 updates for their devices, that should be done through Sony's PC Companion software. All you need to do is plug into the Xperia Z Ultra computer, turn on the PC