We don't know exactly what's included, but Sprint's sending out that rumored over-the-air Android software update to HTC EVO 4G devices this morning. It's labeled as version 1.47.651.1, and it's just 21.43MB, so we're guessing it's just mostly bug fixes, but word on the street was that it would "enhance" WiFi, so there's a chance it could enable the EVO's 802.11n support, and we're also hoping for some improved battery life. We'll update you once we see some release notes, but in the meantime let us know how it goes, yeah?

Update: Release notes have been posted, and they're just as expected -- and unfortunately, we still don't have confirmation on whether "improvements to WiFi performance" means 802.11n. Check the full notes after the break.

[Thanks to everyone who sent this in]

HTC EVO 4G Software version 1.47.651.1

Update includes:

  • Improvements to Wi-Fi performance
  • Exchange Active Sync improvements, including fix to issues with new account setup, PIN policy usage and Exchange Calendar 2010 Sync
  • Addresses Facebook sync issue which can improve battery performance

Download Timing:

  • Customers will be notified that an update is available. The download will take a couple minutes (depending on the device connection) and the install will take a couple minutes which includes an automatic power cycle. Download will take a couple minutes if in 3g coverage.
  • HTC servers will push the OTA update on a daily basis.
  • FOTA server will check for old software version and prompt once a day on units without the latest firmware until customer accepts.

WARNING - Rooted Devices:

  • Most likely rooted devices will not accept or even receive the update which is expected and why roots void warranty.