iPhones have had 4 mics since the 6s, and that is enough to do some beam forming and target individual voices. Phones with 3 mics such as Pixel phones, iPhones

iPhones have had 4 mics since the 6s, and that is enough to do some beam forming and target individual voices. Phones with 3 mics such as Pixel phones, iPhones starting with 5, and various phones from other manufacturers, can have some basic beam forming capabilities for picking out voices.