Amazon.com: 4G Outdoor CPE WiFi Router, Yeacomm 3G 4G IP66 LTE CPE Kit | LTE Unit with Sim Card Slot + Indoor AP WiFi Hotspot, 150Mbps CAT4 Mobile WiFi Router,Not for Verizon :
How SIM Card Router Works? Mobile Router with SIM Card Slot
Amazon.com: 4G Router, 4G LTE USB Portable Smart Router Pocket Mobile Network Hotspot USB Modem Wireless with SIM Card Slot for Car Outdoor : Electronics
Amazon.com: DO 300Mbps 4G LTE Modem Wi-Fi Wireless Router for RV or Mobile Home with Strong Signal, USB Port and SIM Card Slot with External Antennas for USA/Canada/Mexico SIM Card : Electronics
KuWFi 4G LTE Mobile WiFi Hotspot Unlocked Travel Partner Wireless 4G Router with SIM Card Slot Support B1/B3/B5/B7/B8/B20 Perfectly with Home/Office