Prepaid unlimited hotspot plan from an AT&T reseller through work....signal issues abound

We got a prepaid unlimited hotspot plan from an AT&T reseller with a Netgear M1 through work and I have been unable to find a reliable connection anywhere in our home.

Wondering if anyone has any suggestions for how to improve signal strength/quality or if this is a lost cause?

https://imgur.com/a/zcnRZox