Pepwave failure

Pepwave Max BR1 MK2, was working 3 days ago. Had been working well since activation 2 months ago. It stopped working without warning 3 days ago. I have since moved 600 ,miles and it still does not work. The RV park I am in is where I was when it was activated, so the local wifi isn’t an issue. At service providers (tech) suggestion I have installed new sim card and have rebooted router. Still no activation, or indication that there is a network present. AT&T indicates that service is active. I have checked all physical connections. Is there any web download that I have initiated that would interfer? The only download I have recently done was from iTunes.(songs) Any ideas?