1.No night mode2.No auto brightness 3.Finger-print sensor is slow 4.After oreo update and security patch of December 2018 mobile is not stable5.Battery is draining fast6.Battery backup 7.Compare Marshmallow and Oreo update     u will see a big diff...

Samsung should give us the portrait mode because its is needed to us.....They should give the update of it ....and to other model mobiles also...