Six Zenfone 4 phones appeared on the Asus Zentalk forum. A screengrab from Google Support’s site revealed the Zenfone 4 Max, the Zenfone 4 Pro, the Zenfone 4 Selfie and three different versions of the Zenfone 4 flagship are approved for Google services.
The Zenfone 4 Max (ZC554KL) comes with a model name ASUS_X00ID and is a direct successor to the Zenfone 3 Max. It is expected to have a large battery but midrange specs.
The Zenfone 4 Pro is a new device within the Zenfone series so we are yet to find out where it’s positioned. All we know so far is the model name ASUS_Z01GD.