Though the international variant of the Sony Xperia Z was recently upgraded to Android 4.4.2 KitKat, those in the U.S. aren’t as fortunate as T-Mobile has only finally gotten around to updating the waterproof handset to Android 4.3 Jelly Bean. T-Mobile customers should begin getting their update notifications now. This brings the firmware build to 10.4.C.0.814 for the Xperia Z on T-Mobile.




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