Samsung's been following a system on the basis that only flagships are able to receive montly security updates rest are to be recieved only quarterly security updates, period.
For your reference go to Settings->About Phone->Software Information->Android security patch level, later you will be redirected to an official site where you can find the list of devices. (List as provided by Samsung)
Some are attached herewith:-
For your reference go to Settings->About Phone->Software Information->Android security patch level, later you will be redirected to an official site where you can find the list of devices. (List as provided by Samsung)
Some are attached herewith:-
