phone slow and have doubt

[smilysahul]

After July I have doubt that I have attacked by some malware or some other. But I'm not sure about that. I have got that doubt because 

1) phone is some what slow 

2) some thing is downloading but within seeing that it was dissappearing. Even though I seen that  fastly there was no detail on the top. It is not going anywhere if I touched that noticification also

3) yesterday I have seen one thing. While playing games( on Flipkart) , the display comes with some black bubbles( moving from place to place) at some places and went after some time.

Can I do the reset, to come out from this problem. 

Mobile model: A20

[smilysahul]

I will accept the solution for those who andall told me a correct solution and I will like that comment also.

[Ehsank · Accepted solution]

wait...
first try these settings

Reset App Preferences.
Settings >Apps> Tap on Top Right 3Dots and select Reset App preferences.
This will Help you to overcome this issue

[smilysahul]

bro! this will enable all the disabled apps bro! I have just disabled the Facebook and netflix and Facebook services alone. will this solve my issue?

[Ehsank · Accepted solution]

it will not enable any disable app
but after done that settings, just for confirmation check again your disable apps

[smilysahul]

ok bro

[brijkishor1982]

my screen shot not working I bought Samsung m31 on 30th September 2020.what I should do.

[smilysahul]

restart and check the screenshot. we can take the screenshot by different manner
1) press the hold volume down and power button
2) turn on the assistance feature in the setting if available for your mobile model.
3) turn on palm swipe option to take the screen shot in the settings

[smilysahul]

restart itself will solve your issue. that's just a lag of the phone.

[smilysahul]

if you think this is correct solution you can like it and start following me 👍