A few weeks ago, ASUS released the ZenUI 4.0 update for the ASUS ZenFone 4, and now, finally, the ZenFone 3 Max (ZC553kl) is also receiving the upgrade. The release notes are very short, encompassing nearly all of the changes under "upgrade to ZenUI 4.0". Thankfully, ASUS has released what the new features actually are...