I bought a new phone for Apple Sotre

I bought a iphone 6 from Apple Store Sep 28, 2015. Since I got the iphone was rings good, I called the support? They made a reservation to exchanged,

After a gril test ring that didnot work, they exchange a new phone to me. I went to home I first did put SIM card. I use the WiFi to set up.

After I selected my Wifi I can't go NEXT because it is gray color. I turn off power 3 times I got to set up. they asked me "set as new iphone"I push this icon.

next show up, Touch ID and Passcode in 6 digital number, I finial realized the "new iphone" is not new phone. I also got a email. my imessage and facetime and ID has been by My ID. I should to check.I call support asked them. The supporter told me they gave me the phone is new. they think i am a