Why YSK: I’ve been seeing an increasing number of phone photos shared online in 9:16, 9:21 or similarly tall aspect ratios, often with parts of the subject cut off. I’ve asked a few people why they cropped their images that way, and none of them knew they were cropped.
This specs site gives the main camera resolution as 8160x6120 (4:3). Assuming that’s right, something weird is going to to get that result.