Amazon.com: 4G WiFi Router 300Mbps 3G/4G LTE Car WiFi Wireless External Antenna Router Extender Strong Signal Open WRT with USB Port SIM Card Slot with 4pcs 5dbi Antenna (B2/B4/B5/B12/B13/B14/B66/B71 US Version) :
D-Link DWR-921 3G 4G LTE SIM Slot 10/100 LAN WiFi Wireless N Router 2x Antennas | eBay