Amazon has made Fire OS 4.6.1 available to the Fire Phone, which pushes the device up to Android 4.4 KitKat and makes a significant number of improvements.
Fire OS 4.6.1 adds support for Bluetooth Low Energy and wireless printing; adds keyboard options and color choices for the calendar and lock screen; and makes improvements to the lock screen, notifications, messaging, and calling apps.
The updates OS also adds new enterprise and accessibility features, and fixes dozens of bugs. Fire OS 4.6.1 is free to download and install.
