Screen lock

[Android Central Question]

A screen lock randomly appeared on my phone. I go into settings and it says I don't have a screen lock set. This screen lock shows my camera and contact widgets as well as a large ad. I don't recall clicking anything. One second it was fine and the next i have this lock screen. Anyone else experience this?

 

[belodion]

I’m sure they have, but does it persist in Safe Mode?