Wow! They sent you back a superior camera than the one you originally purchased!
Yes, you can use it just like you are using the others, as regular trail cams. The Code Black is simply their Extreme Black 60 unit with a sim card and an antenna. You can simply ignore the cellular feature if you prefer.
What you just experienced is the superior customer service that has made the Covert company "famous".
As with all other cams made in China, you are going to have some lemons. But unlike some other companies, this Kentucky-based company distributing the Covert brand ----- They really do place a high value on providing customer service --- at least that has been my experience with them.
But no one should expect to send in a malfunctioning MP6 and expect to get back their top-of-the-line Code Black cam. They would more typically send back a similar replacement cam, but typically it might be a year newer model.