Sprint is pushing an update to their HTC EVO 4G LTE today bringing the phone’s software version to 3.16.651.3. The update addresses mostly minor issues with the handset, the most major changing being the implementation of audio/video output via an MHL cable.
Bugs and tweaks include include improvements to the phone’s proximity sensor, WiFi connectivity, and Bluetooth compatibility. The update is arriving over the air, so it may not hit all users at once. You can check for updates by navigating to the ‘About phone’ screen under the Settings menu.