Great news for HTC Desire 816 users in India, the company has started the roll-out of Android 5.0.2 Lollipop OTA upgrade for Desire 816 in the country. The latest software comes in 862.8MB file and brings important improvements and bug fixes including enhanced notification and lock-screen with new Lollipop UI, search function within the settings, and the Android 5.0.2 Lollipop. After successful update, your handset will run software version 2.34.720.1.
The OTA upgrade usually takes couple of days to hit every device. You should receive an update notification when it is available to download for your handset. You can also check out the update availability manually by heading to settings>>about phone>>software update.
Before starting the upgrade, make sure that your phone is connected to Wi-Fi network (not mandatory, just to save data charges) and the battery is charged 50%, at least.