I’m trying to build an app to control a 4g/wlte controller (such as this device), for various purposes. These controllers usually come with a set of apps (i.e. Play store or App store).

How do these apps work? Do they connect on a specific 4g wave? If so, how can I do this using Flutter? or would this only require a native solution using Kotlin / Swift?

My aim is to be able to send data to the controller and receive feedback from it, assuming I already know the data structure it requires and the data models it interacts with.

I specifically want to know if Flutter has any library or package or the ability to connect with other IOT devices which have a 4g sim card

Any help is appreciated, thanks in advance.