For support iPhone I have graduated no one one help

Hey everyone see this subject,today I bought new iPhone 12 Pro Max 128gb from store near my region

all is good

i check imei I see no active iPhone I automatically think the iPhone is original new

so I bought it but I use it for 8 hours The status of this imei not change

i see some video in internet and I understand that me the one user who open it

and my guarantee 30/07/22 write in settings phone

so why I have this status no change to active ? That Need to know