Because s6,s7,s8 are too big for me maybe not only for me... (If I have any mistakes it reason is I am new in English, sorry ☺)
Hi Foziljon. Yeah, there aren't any mini release on the last 3 S phones. I think they were replaced by the A series. Check out Samsung Galaxy A3 (2017), Samsung Galaxy A5 (2017), and Samsung Galaxy A7 (2017).