Heads up, HTC EVO 4G LTE owners. If you have this handset running on Sprint network, you may want to head into Settings > About Phone and see if the latest OTA update is available on your handset. The update, which bumps the device up to build 3.16.651.3. This is an important update, bringing a few enhancements and a bug fix. After upgrading to this build, you will be able to stream audio/video to a HDTV via an MHL cable.
The update also includes improved Wi-Fi, improved Bluetooth compatibility, Proximity sensor improvements while you are on a call or listening to voicemail. This update also fixes Android process/application shutdown issue.
Sprint is in the process of pushing out this update now. To see if it’s available on your phone, head into Menu –> Settings –> System updates –> HTC software update –> Check now. Otherwise, you can wait to be notified when it hits your handset.
Source: Sprint