Checkout Samsung Galaxy S5 Android 4.4.4 Kitkat Update to T-Mobile, AT&T, Sprint, Verizon Wireless with release dates.
Galaxy S5 Android 4.4.4 Kitkat
Android 4.4.4 Kitkat is dated July first week update from 4.4.3 Kitkat. In June there were two version of Android 4.4 Kitkat was released and both devices concerned about the Android 4.4.2 Kitkat problems and they continue to come up with few flagship devices before official Android L release.
Past month or so, Android manufacturers are busy in bringing the Android 4.4.4 Kitkat release to existing phones on 4.4.2 Kitkat. The 4.4.4 Kitkat update was released for Nexus 5, Nexus 4 and Nexus 7 tablets.
Verizon Galaxy S5
Verizon Galaxy S5 Android 4.4.4 Kitkat update is already available. Among the noticeable features, it includes support of Advanced Calling 1.0 and brings the support of Verizon VoLTE to the device.
Sprint Galaxy S5
Sprint is yet to release Android 4.4. Kitkat update to Galaxy S5 phone. Certainly the update will arrive very soon.
Optus Galaxy S5
Optus Galaxy S5 is currently running the Android 4.4.4 Kitkat, the latest version.