The UK model Moto X (XT1052) is the latest version of the handset to see a bump up to Android 4.4.4, the latest version of Google's OS. Alongside the new Android version, the updated Moto X firmware includes camera improvements, the ability to pause video while it's recording, and an updated dialer app that matches the look of the latest stock Google dialer in 4.4.3 and above.
Perhaps just as important, it's now possible to turn off the persistent carrier text in the top-left corner of the status bar — a long-running annoyance with Motorola handsets. To do so, go to Settings > Wireless & Networks > More > Mobile networks, and uncheck "Show mobile network."
Unlocked Moto X owners in the UK can go to Settings > About phone > System updates to grab the latest OTA.
More: Moto release notes