HTC has started rolling out Android 4.2.2 Jelly Bean Update With Sense 5 in India for One X, One X+ and Butterfly, according to HTC India Facebook page.
The update brings many features of the HTC One including Blinkfeed, and Sense 5 to its last year flagship phones One X and Butterfly. The update is around 400MB in size and available as Over The Air ( OTA ) update. To check for the update manually, go to Settings > About > Software Updates > Check now.
The HTC One has also started getting the Android 4.3 update in other regions, but it has not arrived for Indian users yet. For the One X and One X+ users, the Android 4.2.2 could be the last official update from HTC.