The Xperia XZ4 will have a 52MP sensor, the highest of any smartphone right now. The current record is held by the Honor View 20, which has a 48MP sensor.
The camera system in question is comprised of three cameras. The first is a 16MP telephoto camera with an f/2.6 aperture lens. The middle camera is the 52MP camera with f/1.6.The last camera at the bottom is a 0.3MP ToF sensor with an f/1.4
This supposed 52MP sensor could theoretically use 4 to-1 pixel binning to create a 13MP image. It comes with a 6.5-inch QHD+ display, 6GB of RAM, 128GB of storage and a 4,400 mAh battery would power the Snapdragon 855. Should this be true, it will be quite a long display and among the first devices to launch with Qualcomm new chipset.