Last we heard, HP said that the Elite x3 will receive Windows 10 Mobile Anniversary Update "in the coming weeks." Well, the good news is that the update has started rolling out - it's available both over-the-air as well as through the Windows Device Recovery Tool. Aside from the Anniversary Update-related changes, the new firmware also brings along support for Double Tap to Wake as well as a charging LED indicator light. It's also worth mentioning that the camera-issues - over which the US sales of the phone have reportedly been halted - have also been fixed. Via
Source: http://www.gsmarena.com/windows_10_mobile_anniversary_update_starts_hitting_hp_elite_x3-news-20724.php