Back in January this year, shortly after launching it, Asus suspended the ZenFone 3 Android Nougat update rollout due to some bugs. Looks like all the issues have been ironed out as the roll out has now resumed.
The update is for ZE552KL and ZE520KL models, and brings along Android version 7.0. Other changes include addition of bundled notifications switch, improved touch performance, and removal of Asus Share Link.
Users should at-least have 1.5GB free storage on their device before starting the software update. For more information, head to the Source links below.