Actually I don't know how this can happen, all contacts are automatically deleted from my mobile

1.During call automatically network vanished 2.Call blocked option is not working3.Sometimes contact list not showing 

1.During call automatically network vanished 2.Call blocked option is not working3.Sometimes contact list not showing 

I am facing Network Connection and heating Problem with Samsung M52 Every time I need to restart my phone to fix that issue. Did anybody have resolution for this?...Highly recommend to all please do not buy Samsung M52.....it's a very bad phone from ...

Since 3days  am using samsung M52 5g and facing battery quick battery drainage issues ,Over heating and touch screen sensor issue