I am not familiar with the 7549, it appears to be a 3G wireless device. Do you have a product web page to refer to for a description (e.g., it might give the chipset and other specs)?
Generally speaking for wireless, you’d need the extra firmware package which helps configure the device, along with the driver to make the device available. Then any program which is meant to work with the device (which might also need to be installed) could use the device. Most devices do not have the driver installed by default, nor the firmware, although quite often a kernel module can simply be built and added to an existing kernel.
So far as “compatibility” goes, the question is usually whether there is a Linux driver available for the device at all, and secondarily, whether the device is available under ARMv7 architecture (some drivers do not care about architecture, others must be ported to each architecture). Quite often the key to answering this is knowing the chipset.
You mentioned serial port recognition as well, you may actually mean a different port, as the DB-9 serial port connector on Jetson runs a serial console and is not available for other devices. I do not know of any serial port requirements on any of the wireless cards. Again, a URL referencing what the card specs are would help to understand this.