why samsung dont have app lock ?they should add this feature as soon as possible

Why my display is flickering ??everytime i open instagram is starts to flicker...not expected from a high end smartphone !!!#s24ultra

Its been two years..and my tablet frequently hangs...even rebooting doesnt help....RAM ROM is free...Animations are almost kept zero..!What should i do..?I am tired of being a samsung customer ..This company is still far behind in terms of quality.

Why the hell my tablet keeps hanging..it happens so often...only after 1.5 years of moderate use....I reset my device...nothing has changedwhat should i do ??@samsung has disappointed me in many ways...very bad performance..slow processing...worst bu...

#s21fe #s21fe5g