My router has now completely stopped working showing the following message: "No SIM card detected or SIM card error." I rebooted the router and ejected the sim and reinserted it and still nothing....

@Sunshine Ok, thank you for the response and hopefully, resolution to the issue. I just loaded the firmware you sent and will see if it resolves the issue.

I am having this same issue and am on the latest firmware posted on the product page (1.4.0 0.9.1 v0001.0 Build 230414 RC.39533n)