No LTE 4G Netgear Nighthawk M1 ATT Prepaid

Purchased through Amazon Netgear seller.

With AT&T  I am only able to connect with WCDMA (H and H+).

I have long discussions with AT&T still no resolution.

Using cellmapper.com I located two dedicated ATT cell towers.

Tower 1
Bands 2,12,14

and...

Tower 2
Bands
2,12,14,30,66

The device was set at Cellular --> LTE All

At each tower... I turned off the device, and turned back on.

I drove around the towers to be sure to get any possible cell locked in.

No LTE 4G...

I even replaced the SIM, which was the "only" solution that I have found to resolve the issue.

As a test that the device could get a real LTE (not H and H+)...

I got a pre paid data only from T-Mobile...

Immediately it connected to LTE,

Why can I not connect to AT&T "real" LTE ??

The Nighthawk M1 is the same as sold at AT&T store/website....

The only difference between "their" device and the Amazon Netgear device would be some firmware blocking me access to there LTE network ?

Are these Amazon Negear Nighthawks not compatible with AT&T 4G LTE ?

I have had the unit for a month... tried everything I know.