Setting up a 4G/LTE modem with PFsense as the main internet connection: Netgear LB2120 | The Smarthome Book
Amazon.com: NETGEAR 4G LTE Broadband Modem - Use LTE as Backup Internet Connection, Unlocked, Works with Any Mobile Network Provider (LB2120) : Electronics
Cellular Modems: 4G LTE | NETGEAR
Review: Netgear 4G LTE Modems - Mobile Internet Resource Center
Amazon.com: NETGEAR 4G LTE Modem – Instant Broadband Connection | Supports Power over Ethernet | works with AT&T and alternate carriers (LB1121) : Electronics
NETGEAR 4G LTE Broadband Modem (LM1200) – Use LTE as a Primary Internet Connection or Failover Solution for Always-On WiFi Certified with AT&T, T-Mobile and Verizon