TO CHECK IS THE IPHONE ORIGINAL OR FAKE

Hi, can u check for me the phone status is it original or fake? I suspected the phone is not original since I cant find the warranty status on the setting (about phone).

i bought it yesterday. How can I check the iPhone is original by Apple or not?

this is the serial number : G6***PHJ

together I attached the snap shot from that phone .

[Edited by Moderator]