HTC users are eagerly waiting for their Lollipop 5.1.1 Update, especially the HTC One M9 owners who bought the company's latest expensive flagship.

Now, the Official Android 5.1.1 Lollipop update is rolling-out Over-the-air (OTA) to HTC One M9 users worldwide. The update packs the hugely acclaimed Stagefright exploit patch.

@LlabTooFeR 5.1 update for HTC m9 Singapore pic.twitter.com/7FW4efodxO

— Marc Enriquez (@marchitecto) September 9, 2015

The OTA package is about 900MB in size and brings lots of bug fixes, security enhancements and performance improvements to the flagship which is expected to receive the Marshmallow update by Early 2016.