I charged my mobile 60 % after 1 hour it's drained to 15 %

After sending a msg con't receiving a notification .... like received successfully..This is a small and primary feature how the samsung is forgetten

We are daily checking the availability of system updates but there is no updates from 3 months .I don't what happened to samsung m21 ... but m31 and m31s and so on mobiles were already got Nov security patch update and also Ram plus features and so...

This is sad news because of not having the app lock in galaxy m21 till now

When swiping up to unlock the screen that icon is moving from middle of screen to the left of above cornerYou can see below mentioned picture