Both T-Mobile and Metro PCS have begun to send out the Android 6.0 Marshmallow update to the HTC Desire 626s today, moving subscribers off of Android 5.1 Lollipop and onto what is the latest version of Android software available, save for the upcoming Android 7.0 Nougat software which could launch in the near future. As is always the case with software updates that end up being pushed out to devices, they can often take a little bit of time to reach every single user on the network that owns that particular device, which means some users may end up seeing the update come through on their phones today, while others may not see it for a few days.
Having said that, anyone who owns an HTC Desire 626s on either of the two above mentioned networks and has not yet seen the notification pop up that alerts them to an available update, it is still possible to see if the update is available to install by manually trying to pull it down from the network. To do this, simply head into the settings menu and scroll down to the about phone section, tap on it and then find and tap on software updates, which should be the first option. If it still shows that the device is on the latest version of software, the only thing to do is wait.
Since this is Android 6.0 Marshmallow, HTC Desire 626s users can expect the usual string of features and changes, which includes the addition of Doze Mode and App Standby, both of which were designed to assist the user in extending battery life. More granular permissions controls is also coming along for the ride with this update which allows users to enable some permissions for apps while not allowing others. Perhaps one of the bigger feature adds is Google Now on Tap, and overall the user experience on the phone should feel smoother. T-Mobile lists this update as weighing in at 835MB so it isn't the largest of any Marshmallow update that has been pushed out to a device, but it's still recommended that users download the update file while connected to a local WiFi network instead of using a cellular data connection. The battery life will also be required to be at 50 percent at the very least before the update will actually begin downloading.