Amazon.com: NETGEAR 4G LTE Broadband Modem - Use LTE as Backup Internet Connection, Unlocked, Works with Any Mobile Network Provider (LB2120) : Electronics
Amazon.com: 4G VPN Router, Industrial Dual Sim 4G LTE WiFi Router 3G/4G Yeacomm YF325 Wireless Modem Router Unlocked with Sim Card Slot, External Antenna Cellular Modem in North/South America, NOT for Verizon :
Your internet will never break and neither will your bank with TP-Link's VR400 featuring 3G/4G Failover & Fail back - MiRO
DVCOM Technology - Draytek Vigor2620 LTE Series is a VDSL2/ADSL2+ modem router with embedded SIM card slots for 4G/LTE failover, equipped with 2x Gigabit Ethernet LAN ports, one of which is switchable
4G-AC68U|Modem Routers|ASUS Global
DrayTek Vigor 2760Vn High Speed VDSL2 Modem Router with ADSL2+ Fallback, Wireless Network Supply
Dasan Zhone Solutions - 6519-W1 - ADSL2+ 4 Port Router with WiFi N 2×2 | Multicom Online Store