Verizon has started pushing out over-the-air updates to Android 5.1.1 Lollipop for both the Xperia Z3v smartphone and the Z2 Tablet. This rollout might of course be considered a bit late since the next version of the OS, Marshmallow, has already been out for months. Then again, perhaps the 'better late than never' mantra applies here. For both devices, the new software version is 23.4.B.0.319. Aside from everything that Google included in the 5.1.1 release of Android (including security patches), Sony's update also brings with it HD Voice support for the Xperia Z3v. As always in these cases, the rollout will surely be staged, so it might take a few days before it reaches every single Z3v and Z2 Tablet out there. If you're impatient you can manually check for the availability of the new software by going to the appropriate section in Settings. Full release details for both devices can be found at the Source links below. Source 1 Source 2 |...
Source: http://www.gsmarena.com/verizon_outs_android_511_update_for_the_sony_xperia_z3v_and_the_z2_tablet-news-16886.php