T-Mobile is rolling out a new update, version 1.43.531.3, for the HTC Amaze 4G. The new update includes several stability improvements, bug fixes, and a few new features, including WiFi calling & Google Music compatibility. You can either wait patiently for the OTA to roll out, or you can check for the update manually by tapping Menu > About Phone > HTC Software Updates > Check.

Source: AndroidPolice