https://daringfireball.net/2024/11/disambiguating_iphone_model_names_that_have_the_s_suffix
Daring Fireball: Disambiguating iPhone Model Names That Have the ‘S’ Suffix
Apple’s S suffix for certain iPhone models — 3GS, 4S, 5S, 6S, XS — has always been problematic in this regard.
daring fireballmodel namesiphone