They don't capture a light field like Lytro did, they capture a regular image with a very deep depth of field, extract a depth map (usually with machine learning, but some phones augment it with stereoscopy or even LIDAR on high end iPhones) and then selectively blur based on depth.
Phone cameras fake it.
They don't capture a light field like Lytro did, they capture a regular image with a very deep depth of field, extract a depth map (usually with machine learning, but some phones augment it with stereoscopy or even LIDAR on high end iPhones) and then selectively blur based on depth.