HTC confirmed Android 8.0 (Oreo) update for some of its devices back in August last year. The HTC U11 was the first phone to get the Oreo update in November starting from Taiwan, later the U11 Life got the update, after a delay the HTC 10 got the update recently. Now the company has finally started rolling out Oreo update for Indian users that also brings VoLTE support for Reliance Jio users.
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Android Oreo comes with lots of new features and improvements including Background limits, Notification channels, snooze notifications, Autofill APIs, Picture in Picture (PIP) display, Adaptive icons and much more.
The v3.18.400.2 for the HTC 10 is 1.43GB in size, but it still has Android security patch for December, 2017.