SIM Card Connectivity on Roc 5B+

I am a Newbie working with SBCs, I have been planning on buying the 5B+ and my use case requires me to have Internet Connectivity using Mobile Data from a SIM Card. Now, I have no experience working with any LTE Module. I only have some basic Linux Knowledge and experience with Micro-Controllers. I would like some guidance on Configuring the Mobile Data through SIM Card.
Thanks in Advance

The B key documentation for ROCK 5B+ is not available at the moment, but for now you can refer to this document.

https://docs.radxa.com/en/rock3/rock3b/getting-started/interface-usage/pcie-b-key