Not picking up LTE?

Hey everyone - I just setup my Nighthawk hotspot and seem to only be picking up 4G and not LTE.  I'm wondering if I need to update a setting somewhere?  

I've always been able to pick up LTE with my phone (via AT&T) in my home. 

 

Checking to make sure it wasn't an issue with being inside the house, I also took the hotspot with on a drive around town today and it never did switch to LTE (in areas with previous good LTE coverage on my phone also).  Thanks in advance.