Asus has started pushing out a new update to its Zenfone 3 Deluxe smartphone that bumps the version to 5.15.44.2494. It brings improvements related to camera and ZenUI stability. The only other change that's included in the update is improved Bluetooth connectivity. As is usually the case with OTA roll outs, it may take some time before the update notification pops up on your handset's screen. Source | Via
Source: http://www.gsmarena.com/new_asus_zenfone_3_deluxe_update_improves_camera_performance-news-26094.php