Today, my phone out of nowhere started opening random spam/scam sites. What can I do to make it stop I have an Huawei mate 10 lite, and today it started randomly opening my browser and showing me scam sites. I have tried some anti-virus apps, but after a full scan they didn't find anything. I also looked at my apps, to see if anything suspicious app was there, but I didn't find any blank app/unknown app. The only thing I don't want to do is to factory reset my phone. Can you help me with my problem?
This thread had the answer for me.  It turned out to be the latest QR code scanner.  It said it had ads but did not say it opened them in the default browser randomly.