I got my new modem card (original needed to be RMA’d) and when I set it up it went to 3G, even with a booster. I tried forcing it to 4G and after initializing it said No Network.
My init string is ATZE0&D0&C1+IFC=0,0;+CSCS=“GSM”
Isn’t GSM not 4G? Is that part of the issue?