Any one know on which date Samsung galaxy A21s get its one UI 4.0 update

Plz anyone tell that how samsung A21s receive one UI 4.1

I think we invest some more money in iphone 7 or 7 plus for better performance without lags and buggs

These days i have ssen lots and lilots of bugs in my A21s smartphone it will happed in my lock screen when i swipe up had diled my pass word it seems lots of bugs and in control pannel also , when ever i am swipe down it seems lag and lots of bugs pl...