Australian carrier Telstra has given the first hint of when we might see Sony’s Android 4.2.2 Jelly Bean update for the Xperia Z (C660X). Over on its handset update page (last updated on 17 June) it says that the Android 4.2.2 update was received on 14 June and is currently going through first round testing. The carrier expects to approve the update on 1 July and release it to customers on 15 July.
As Telstra is likely to be running customised firmware, there is a good chance that the generic Xperia Z update will hit handsets even earlier. We understand that firmware version 10.3.A.0.423 is the Android 4.2.2 build that will launch to customers. We’ll keep you posted on further developments.