We have spotted a third Zenfone 3 model for the US market. It’s the Z01FD which is a mystery to us right now. With the release date nearing for the US market, we are hoping for some more details. There are two yet unannounced Zenfone 3 models which have us curious. Because we can’t find info on this Z01FD, perhaps this is a new model that has yet to be unveiled by Asus. Our experience following Asus FCC submissions says that four to six weeks is the most likely for a retail release after showing up in the FCC database.