Night Hawk M1 stopped connecting to t-mobile network

Recently lost connection to the T-Mobile network and it's been working almost perfectly for the last year... Switched sims, updated the firmware, factory reset, changed every setting imaginable on the modem and I still can't get connectivity. Does anyone know if something changed on the network side that's causing this issue? Is anyone else using t-mobile and having similar issues? I just ordered a different netgear lte modem (LB1120) that should be here tmr just to verify if it's a mechanical issue or coming from the network side. I've had some issues with the M1 rebooting itself quite frequently so I'm starting to think it just took a **bleep**. I really don't know what else to do. Any suggestions?