Last week another vivo smartphone was spotted on TENAA, and today the device is official. Although it looks a lot like the vivo V9 or the vivo Z1, it is actually called vivo Z3x, despite having almost identical specs. The phone has a Snapdragon 660 chipset, coupled with 4 GB RAM and 64 GB storage. The screen is 6.26" LCD panel with Full HD+ resolution and a notch that some would call retro. The cutout houses the earpiece and the 16 MP selfie shooter, sitting behind an f/2.0 aperture. The front-facing camera is the only hardware difference from the vivo Z1 that has been official for...