T-Mobile has today announced that its carrier-branded Xperia Z variant is the latest in a long line of Sony devices now receiving the largely requested Android 4.3 update. This upgrade brings a truckload of bug fixes and stability improvements, as well as an updated version of the Japanese company’s Walkman custom user interface.

Motorola pushes out a fairly minor update for its very popular Active Display application. Sadly, the app is a Motorola exclusive and is currently only available to download on the Droid, Ultra, Mini, Maxx and Moto X, though, recent rumors suggest that the Google-owned company will expand compatibility to some of its other smartphones in the not-too-distant future.

ASUS has announced that the much-anticipated Android 4.4.2 KitKat over-the-air update is currently in preparation for all ASUS PadFone 2, ASUS PadFone Infinity, ASUS PadFone A80 and PadFone Infinity variants located in Asia, Europe and North America. In addition, the Taiwanese company also reported that due to popular demand, the latest version of its ‘Zen’ user interface will also be bundled into the upgrade.

Motorola is the process of pushing out a major over-the-air (OTA) stability update to all its unlocked Moto G variants currently located in the U.S and the U.K. This upgrade transports bug fixes for a bunch of irritating problems which Moto G users have reported to the Google-owned company via Facebook and Twitter.

AT&T posted the update documents for a rather pleasing upcoming upgrade for Samsung’s former flagship smartphone, the Galaxy S4, on its official website last night. The paperwork reveals that the update, build number KOTH49H, will start rolling out later today and is scheduled to bring the latest build of KitKat, in addition to compatibility for the Galaxy Gear 1 and 2.