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Adware / Malware on phone

ManieyaK_ used Ask the Experts™
I've got a Samsung Galaxy S9+, every time i unlock my phone I'm presented with some sort of ad.  I've downloaded Malwarebytes, scanned phone nothing found, I also have Norton 360 installed on device this also finds nothing.
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Paul MacDonaldDirector, Information Systems

It's possible your service provider put something on there.  The manufacturer does as well, sometimes.  You should be able to take it to your cellular provider and get help that way.   Alternately, just uninstall any apps you aren't using/didn't install.
Alternately, just uninstall any apps you aren't using

Personally I'd start with any apps you may have installed. (If any)
IT Manager
Top Expert 2010
Go to Google Play Store>Menu>My apps & games>Click the "Installed" tab>Click on an app>Under the Open button, you'll see some text that indicates wheter or not the app contains ads.

Source: https://us.community.samsung.com/t5/Galaxy-S10/Pop-up-Ads-When-Unlocking-Device/m-p/528139#M9090