Unable to sign in to google or add a google account

I got a problem with using this phone I just got. It is an LG V20 H918. I am currently unable to sign into Google Play, like the prompt to enter my google play account wouldn't show up. I have factory reset the phone and it wouldn't get past the checking network screen. So I set it up without WiFi, and connected it later. Now the problem is that I cannot sign into google play. I would attempt to add an account and would tell me that it couldn't connect to servers, even though the internet is working on the phone. I have tried factory reset, and I still cannot even enter my email address because the prompt wouldn't even show up. Is it a possible defect?

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