I ordered a Visible.com SIM for unlimited Data. I activated the SIM in my phone and was able to make calls and use the data connection. When I insert the SIM into the RUT955 I get the Green/Red light flashing next to the RSSI indicator telling me that no SIM has been inserted.
I know the RUT955 works. I have a Limited Data SIM with Verizon that works fine. Visible.com runs off the Verizon network, and is a Verizon company.
EDIT: I've uploaded the troubleshoot file from the router.