Cannot browse on Google or YouTube on phones or laptop on my deco x20, I can definitely do it on the modem.

I search and tried the solutions on the forums such as adding Google's DNS, and so far nothing had worked. I can use yahoo or search on bing.

Also Google play services don't work on phones. 

I checked firewall, parental controls, etc.

The only thing i haven't tried so far, is factory reset.