Back in August, when Asus confirmed that the entire Zenfone 3 and Zenfone 4 series will get the Oreo update, the company didn't provide a roll out time-frame, only saying the update will hit all eligible devices "by the second half of 2018". Well, now we have some news on that front. A moderator at the Taiwanese company's official forums recently confirmed that the Zenfone 4 (ZE554KL) Oreo update is expected to begin rolling out this month. ZE554KL is currently expected to provide upgrades in December Android O Sadly, an exact roll out date wasn't provided, but still it's far...
Source: https://www.gsmarena.com/asus_zenfone_4_oreo_update_likely_arriving_this_month-news-28618.php