This is a brand new watch I got and then we found the other one. It is still in the sealed box and never opened. Comes from a smoke- and pet-free home. 

I have ATT, but did not open the box so I am not sure if it is unlocked or already AT & T and just needs to be reset. See box for details and product ID.

"New in box- Apple Watch SE 40mm GPS Cellular-Silver aluminum case with abyss blue/moss green nylon sport band"

This is from a pet- and smoke-free home and ships next business day.