HTC Desire 826 is now finally getting the Android 6.0 Marshmallow update in India. As you can see the update rolls-out in Two parts. First small update prepares the system for Marshmallow update installation.
The software version has been updated to 1.17.707.13 . With this software update, the HTC Sense version had been moved up to HTC Sense 7.0. The update comes in stages. So you need to be patient to download the update. You can manually check also for the update. The updates brings beauty of Android Marshmallow which includes Google Now on tap, Battery saving, Doze mode, App permissions etc.
You can now see the full list of Android 6.0 Marshmallow Eligible devices and release dates By clicking here.