You should update your HTC EVO 4G LTE to Android 4.1.1 Jelly Bean, you'll have to do it on your own. The over-the-air-update will not be pushed out until January 3, 2012.
The update includes Android Jelly Bean features along with an update to HTC Sense 4 +. The HTC EVO 4G LTE appeared in the top best smartphones of 2012, including best of HTC and Sprint.
The update is software version is: 3.15.651.16. Updates may be released in stages.