Phones with 200 MP main sensor

The image sensor is the camera's film: the chip that turns light from the lens into an electrical signal and from there into a photo, and no single part shapes a phone camera's character more.

200 megapixels are usually not used at full resolution: by default the sensor groups neighbouring pixels and reads them as one large pixel (pixel binning), producing a frame of about 12–50 MP but far cleaner. The full 200 MP mode makes sense in bright light and when the shot will be cropped later; the files get very large.

What actually separates sensors is not the megapixel count but light-gathering ability: the physical size of the sensor and of its individual pixels, the range of bright and dark it can hold in one frame (dynamic range), and the noise it produces in the dark. Those figures need reading off the model's own spec sheet.