Hi everybody, yesterday night I found out that an unwanted lockscreen had taken over my android phone. Please see how it looks like in the attached screenshot. The lockscreen activates whenever the phone is in sleep/inactive mode, hiding my lockscreen. When I activate the phone I stuck into this lockscreen showing date/time, residual battery and ads. I have to slide it away to access the phone. At the same time full screen ads pop up even while using the phone and ads appear on the display like messages from facebook messenger.
I did not install new apps, I can't see any weird app in my app list. I can even see there's a unusual battery consumption.
Thanks for help,
Ettore