And yes... I am actually wondering if the case is actually for the iPhone 14 plus, instead of the 14 PM.

I did try to line up the volume buttons and then tried to pop the other side in, but it just doesn't seem long enough somehow. Maybe it's a case of me just not wanting to break something, so maybe I am not pushing hard enough.

Am going to take it to a T-Mobile store this afternoon and ask them to pop it in... I decided this after trying your recommendation. I'm just not quite confident enough that I have the right case. I would think that T-Mobile would have sent the right case, and they probably did... but I'm not brave enough to force it.