The HTC EVO 4G update to Android 2.2 started releasing some time ago, but there were some users who updated to an early version of the Android 2.2 build and didn't receive the update that most other users received. Yesterday, HTC released the official FroYo update for those individuals that had the unofficial build, just like they said they would.
AndroidandMe notes that "most people will not notice any significant difference between the two builds, but HTC wants to make sure that everyone’s running the same software to make things easier when they roll out minor tweaks or the next version of Android."
Thankfully for you, HTC is now beaming the official EVO 4G patch over the airwaves, which updates your tainted 3.26.561.3 dairy dessert to a more toothsome 3.26.561.6. Just scoot on over to Settings > System Updates and invoke the download -- assuming Sprint is being nice in your area -- or wait it out and your handset might even update itself.
AndroidCentral adds that the update is "just 4.17 megabytes and takes just a couple of minutes to download and install, and you'll find yourself "back on track" with all of your more patient friends."
Image from TalkAndroid
Source: Sprint Community