Get Started with Super SIM, the Raspberry Pi 4 and the Sixfab Cellular IoT Hat | Twilio
SIM7600G-H 4G HAT (B) For Raspberry Pi, LTE Cat-4 4G / 3G / 2G Support, GNSS
Amazon.com: 4G / 3G / GNSS HAT Module for Raspberry Pi Zero/Zero W/Zero WH/2B/3B/3B+/4B/Jetson Nano, Based on SIM7600A-H , 4G Communication and GNSS Positioning Module Support LTE CAT4 up to 150Mbps :
Dongle Usb Raspberry Pi Zero | Raspberry Pi Lte Dongle | Communication Solution - 4g Lte - Aliexpress
Sixfab Raspberry Pi 4G/LTE Cellular Modem Kit | eBay
Using 4G LTE wireless modems on a Raspberry Pi | Jeff Geerling