Five Asus ZenFone 4 smartphone models are seemingly coming soon
Nevertheless, a ZenFone 4 series is expected to be announced soon, possibly in July.
A previous rumor had it that the ZenFone 4 Max would feature a 5.5-inch 1080p display, a Snapdragon 630 (or 660) processor, and a large battery, possibly of at least 4,000 mAh. The Asus ZenFone 4 Selfie should also offer a 5.5-inch 1080p display and a mid-range Qualcomm Snapdragon processor, plus a 12 MP front-facing camera with 4K video recording - a rarity.
Details about the other upcoming Asus phones are currently missing, but we're assuming that all will run Android Nougat out of the box, and the ZenFone 4 Pro will be a high-end model. Of course, we'll have to wait and see if we're right.
source: Google (PDF) via ZenTalk forum, Roland Quandt (Twitter)