Amazon.com: D-Link 4G LTE (Cat 4) to Gigabit Ethernet Modem/Bridge, Best for M2M Applications, Supports OpenVPN, Optional Enterprise Service Platform, Works on Verizon or AT&T (DWM-311-B1) : Electronics
Difference between Cat 1 modem and Cat 4 modem-PUSR IOT
LTE Cat 4 | u-blox
LTE UE Category & Class Definitions - CableFree
LTE UE Category & Class Definitions - CableFree
LTE Cat 1 vs. Cat M1: Choose the Right IoT Modem for the Job - Airgain
Difference between Cat 1 modem and Cat 4 modem-PUSR IOT