It’s on the aPple webpage. Don’t have it off hand.By any chance you know the model number for the unlocked phone?
My iPhone 8 Plus is A1864 I got from sams club with att $300 sams club promo.
So it’s universal 8 plus model
But if I would have gotten att Corp store i would have been stuck with intel iPhone.
A1863 is Qualcomm (universal ) iPhone 8
a1865 is Qualcomm (universal) iPhone X