AirLink Sierra Wireless RV55 1104302 Rugged LTE-A Pro Router with Wi-Fi. North America. DC Power

Where does the sim card go? I do not see a slot?

Is airlink complete service required to configure/use, or can i opt-out from the service and still use the device?

What carriers is this compatible with?

Does this unit come with a sim card or an e-sim card???