I am currently working on a project involving the Thundercomm Rubik Pi 3 board, and I am exploring options to integrate 4G communication with the board. During my research, I found that the M.2 slot could be expanded by attaching a module with a modem and a SIM card slot. I have come across several such modules, but I am uncertain which one would work best with the Thundercomm Rubik Pi 3, as there do not seem to be any IoT projects or detailed guides available online for this specific integration.
I would greatly appreciate any advice or recommendations on how to proceed with the integration, and whether there are specific modules or hardware that you would suggest for reliable 4G communication.