The following model support QC3.0：
Zenfone 3 Deluxe (ZS570KL)
Zenfone 3 Ultra (ZU680KL)
1. Please use ASUS 18W AC adaptor. The adaptor should with QC charge icon in red mark below:
PS： With other non original adaptor can't not charge ASUS cellphone in Q.C3.0 mode.
2. How to identify the cellphone is in QC3.0 mode?
Ans：You could see the icon while the cellphone is charing.