After many discussions with Meraki and their engineers, the resolve to this issue was to activate the internal SIM card, after confirmation of the SIM being active set the internal modem to "enabled" - for some reason it setting to "enable" before the SIM is active, the MX doesn't like it, I have seen this on many many of our MXs. While the MX is plugged into power, remove the SIM tray, unplug the MX, re-install the SIM card while the MX is unplugged, Plug the MX back in. That has solved most of the issues I have seen, and to be honest I completely forgot about this thread, and I never let yall know of the fix. Few of the MX devices we had to replace the internal SIM cards with new ones as the MX would just not recognize there was an SIM installed. After preforming the above, we didn't need to add the APN, it finally pulled that info from the carrier, in this case it was Verizon.
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