How do I remove this counter released/bosh ad..from my edge phone

[Android Central Question]

Everytime I go to unlock phone it does this counting with a circle then a big check mark comes up and says released!! Than a Bush ad appears!! Its driving me nuts!!!

 

[belodion]

Does it persist in Safe Mode?

 

[Javier P]

Also, I've read about a similar issue and in most cases the culprit was a flashlight app. Do you have any?