Amazon.com: Mini Wireless Router, USB Plug and Play WiFi Modem Dongle, Portable LED Indicated 4G LTE TDD FDD GSM Car WiFi Router with SIM Card Slot : Electronics
GSM modem vs IP SMS connectivity
Amazon.com: WiFi Modem Dongle, 4G LTE WiFi Modem, WiFi Modem Dongle with SIM Card Slot, TDD FDD GSM Car WiFi Mini Wireless Router with LED Status Indicator, Up to 10 Associated Users