notification screen from the top randomly flashing up and covering my screen. I don't have a screen protector on and my phone M

[Newgamevsgame]

notification screen from the top randomly flashing up and covering my screen. Samsung M11 

[Pugs1957 · Accepted solution]

Are you using a case or screen protector?

[Newgamevsgame]

No sir I am not using,  thank you for replying. 

[Pugs1957]

Try clearing system cache and see what happens.

[Newgamevsgame]

Still facing same problem sir 

[Pugs1957]

Please have a look at this thread and let me know the result of the test using the dialler S9 notification bar randomly swiping down - Samsung Community

[Newgamevsgame]

After dialing *#0*# after keypad goes and screen come with wallpaper which is first page of my mobile . Thank u sir for reply 

[Pugs1957]

Hi please try this command  *#0*# select 'Touch' from the on-screen options and draw a line through all the squares, do you encounter any issues?

[Newgamevsgame]

Sir *#0*# is not working what to do sir .

[Pugs1957]

I think the next step is to get that screen tested. I would take it to Samsung service centre if still under warranty, otherwise take it to a local repair shop for examination. I think this may be a hardware problem which is not possible to diagnose without seeing the phone. Sorry I can't help you further.