Using 3G USB dongle okay with FCC?

I’m developing an IoT solution for a company and am looking at the possibility of using the Pi with a Particle SIM. This would require a peripheral for the SIM card, like a USB dongle. Because this is a product to be used in a real-world scenario across the U.S. And Canada, I’d like to ask if anyone knew of any regulations I should be aware of. Is it kosher to use a USB dongle in a public environment or is this considered a no-no?