Android 6.0.1 and Sense 7 get pushed out to the HTC Desire 8205
Meanwhile, it isn't exactly clear which region is receiving Marshmallow on the Desire 820, but we do know that the update will bring Doze to the phone. This shuts down apps on inactive Android handsets, and prevents them from running in the background. The bottom line? Longer battery life and happiness for Desire 820 owners.
Google Now On Tap provides contextual search results based on what content is on your phone at the time of the search request. For example, if an email from your buddy is on the screen of your phone asking you to meet him at a French restaurant you've never heard of, "Le Circle Jerques," Google On Tap will give you all the information about the eatery. And Android 6.0.1 will also allow users to grant app permissions on a feature-by-feature basis. The update comes with HTC's Sense 7 UI.
When you receive notification that the update is ready for you to download and install on your phone, you should make sure that you are connected to a Wi-Fi network. You should also check to make sure that your battery is charged all the way to 100%.