What apps have you installed recently? One of them are are causing it. Do a scan with Malwarebytes Anti-Malware if you're not sure: play.google.com/store/apps/details?id=org.malwarebytes.antimalwareLately on my LG g3 I get a pop up saying that security has been compromised and then it shows a button to fix it and normally is a security app. It's annoying... Any way of getting rid of this spam messaging?