Samsung Android 11.x

1) Settings ==> Device care ==> Battery ==> Power saving mode ==> Turn Off

Background usage limits ==> Put unused app to sleep ==> Turn off

More battery settings ==> Adaptive battery ==> Turn off

2) Settings ==> Device care ==> Memory ==>Excluded apps==> Add ==> ==> Add

3) Settings ==> Device care ==>> Menu ==> Automation ==> Auto optimize daily ==> Turn Off

Settings ==> Device care ==>> Menu ==> Automation ==> Auto restart ==> Turn Off

Settings ==> Device care ==>> Menu ==> Automation ==> Adaptive power saving ==> Turn Off

4) Settings ==> App ==> ==> Mobile data ==>

Allow background data usage: Turn On

Allow app while data saver on: Turn On

Only if you have enable Knox Protection in Device Manager

5) Settings ==> App ==> Menu ==> Show system apps ==> Tap on Device security ==> Storage ==>Clear data and Clear cache