I have a Meraki network of about 45 MX64's in remote locations. The latest addition to the network is the same setup on a MX64 except the ISP has dropped the ball and will not be able to install for several weeks. The hardware is already deployed waiting for the internet connection. This MX64 has never connected to the Merak Cloud to obtain its configuration and update its firmware. We are wanting to open the location but we need an internet connection. I have tried plugging in a USB Cell Modem but it won't use this connection to get started. . Is there a trick to use the failover connection to obtain its configuration and come online or is it not possible on the MX64?