Hello, I have a Data only plan with T-mobile and the SIM card I have was working well a few months ago but recently stopped connecting. I am using a PEPWAVE BR1 MAX in my RV.
I have updated to the latest firmware as well as updated the cellular module and it has not helped. The cellular light flashes green. (The Wifi light flashes green even when it is connected as well).
The SIM card I have been using works fine when I use it as s hotspot in a cell phone.