What's wrong with my iPhone? - 2

I recently just got this iPhone ( purchased from another person ) and it was completely wiped out, mind you I haven't connected the phone yet. So I downloaded the IOS 11.2 on the phone and it's asking for Apple I.D. And password so I'm putting it in and it won't let me in. I know my password and email by memory as it's the password and email to many of my other accounts, and I know I'm not misspelling anything as I'm typing slowly and making sure. I noticed that I couldn t update Game Pigeon because it asked for the previous owner s I.D. And password. I don't know if I have to contact them and ask for their I.D. And password or connect my phone. Also it's not connected but it has the MetroPcs and some bars next to it, I don't know if that s what's affecting my log in. I also can't take off the bars or put it in airplane so it's just my internet server. Can somebody help me please?

It hasn't been reset properly, either contact the previous owner or take it to an apple store, as i know of there's no solution you can do without their id

Never buy previously-owned pacifiers, Eve.