MX67C 2 cellular connections

[ChrisPaynter]

I have an MX67C in the field now with Verizon service. I want to plug in an aircard via the USB port with AT&T service. Can this work on the MX67C?

Can i remove the Verizon sim that is inside the MX67C and use only the aircard on AT&T service for connectivity on the devicw?

[PhilipDAth]

You can not use two at once.  If you plug in an external USB cellular modem it effectively disables the internal cellular modem.