Asus was the cheapest Snapdragon 845-packing smartphone when it launched and even now it offer amazing value proposition. It was launched on ZenUI 5.0, based on Android Oreo, and the company has now confirmed it will issue an upgrade to Pie in the second half of January 2019. Asus Zenfone 5z vs. Apple iPhone X In a press release Asus revealed the update will take at least a week to reach all the units, but users should not worry, because the usual notification should pop up. People that disabled the auto-update feature should check manually at Settings -> System -> System...
Source: https://www.gsmarena.com/asus_zenfone_5z_android_pie_january_2019-news-34314.php