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After doing some more searching I found the issue. The modem was in QMI mode, and for FreeBsd it needs to be in DIP mode. I was able to use the Windows tool in this post to be able to switch it, and now it is working just fine.

https://forum.sierrawireless.com/t/change-vid/7064

For anyone else's benefit, QMI is a proprietary Qualcomm protocol, while DIP (DirectIp) is a more open protocol. Even though I was able to download DIP firmware from Siera Wireless's site for the modem, when I tried to upgrade the firmware I kept getting messages that the modem wasn't found. Once I ran the switcher tool, I was then able to successfully update the DIP firmware.

I am trying to get my system set up to use the internal wwan card as a failover. As I am more familiar with Windows, I was able to confirm under Win11 that all my hardware does work. My system was able to successfully connect to internet over the wwan card. Other than installing drivers, I did not have to do anything additional to get it to work.

https://docs.opnsense.org/manual/how-tos/cellular.html

I cannot get it to work with Opnsense though. Looking at /dev, only /dev/cuau0 shows up, nothing like /dev/cuau0.1, /dev/cuau0.2, etc... So I tried to run the command 'cu -l /dev/cuaU0'. I do see a connected, but I do not get a reply when typing anything after that.

I am using a Sierra Wireless MC7700 MPCIE card. It is installed in the Topton system linked below. The system does have an integrated SIM card slot which I am using.

https://www.aliexpress.us/item/3256804173757529.html

Any advice on how to get this working would be appreciated.

I would like to setup a cellular modem as a failover in case there is any issue with my home internet. I am following the incstructions here https://docs.opnsense.org/manual/how-tos/cellular.html. The issue I am running into is the provider I would like to use is Google FI, and this is not listed as a provider. Is there some manual configuration that I can use instead? I am not sure what exactly would be needed for this.

I am in the US and this is a standard Google FI plan. I am hoping to be able to use the same account as my phone. This will then only charge me for data that is actually used. If I never need to use the failover then there is no charge to me.