Radxa 5b+ as backup wan through sim card

#1

Hi I am using radxa 5b+, what I would like to achieve with it is to use it as backup WAN modem for my unifi using sim card.

I have two questions:

  1. Is it possible to work as a modem and pass internet traffic to the unifi cloud gateway.

  2. If above is possible, is following modem ok to use?

https://uk.rs-online.com/web/p/rf-modules/2069154?gb=s

#2
  1. You can do anything that you can do with standard linux networking, you can infact use it as a WAN without problems.
  2. This doesn’t work because it’s a miniPCIe modem. You need an m.2 modem that can work in USB mode.
#3

Thank you very much, I didn’t even notice it is a miniPCIe, but looks like some M.2 modems doesn’t support usb mode so I nees to look for the right one, thanks!