Sony introduced its latest CMOS image sensor for smartphones. It is called IMX586 and has 48 megapixels, each of them only 0.8 μm in size, stacked onto a 1/2-type unit. It will begin arriving at smartphones as early as September 2018.
Sony said in a press release the increased pixel count will enable high-quality photos even when devices are using digital zoom. The IMX586 implements the Quad Bayer 2x2 pixel array. This means on most occasions it will bin four pixels together outputting the equivalent of 12MP sensor with large 1.6 μm pixels.
For bright low-noise photos and videos when shooting at night. During the day or in a well-lit environment, the grid will return to its usual signal processing, reaching 48 MP photos in real time.
Essentially this is the successor of the 40MP sensor inside the Huawei P20 Pro, which also packs a Quad Bayer arrangement. You can learn more about how that works here.