Hello Vince,
It is as you suggest a Cellular Network Radio system akin to the likes of Zello, Echolink, etc.
I found a review that may provide a bit more information :-
https://www.radioenthusiast.co.uk/news/an-introduction-to-network-radios-with-the-inrico-t-320-and-the-inrico/
I know that I get more than enough flack for utilising modes & operation such as FT8, this despite the fact that I am actually transmitting through my own HF set, antennas, etc. and reliant on propagation conditions much the same way as other RF modes. I don't think that has so much to do with 'digital' but more about the limited 'chatting' or conversational operation although it's also an aspect I enjoy.
I personally like the fact that it still operates on the old principles of radio transmission & reception.
Network Radio on cellular systems does give you the option to verbally converse and it doesn't matter if you are licenced or not on certain options. You also don't have to erect some dirty big antenna onto your property.
Some will argue for 'channels' or rooms that only welcome licenced 'Hams', etc. others will argue the free and open option. Some will ask 'Is it really radio?' giving rise to all sorts of arguments.
If it can allow people to connect with a common interest then I'm all for it.
It does however smack of commercial enterprise to me with purchasing requirements pushed to the forefront. I really don't like the idea of subscription services, most of us are used to such services but I tend to avoid them and I can switch on my radio for free.
(Someone's bound to bring up the arguments of original equipment purchasing, electricity etc. so not being 'free'........
)
All I know is that more often than not even a simple 'mobile' telephone call with friends and family can result in disconnections, dropouts and unavailability problems. So I don't relish those sort of problems with such systems.
It's an interesting subject, so thanks Vince for bringing it up.
Hopefully there are others reading this who may be able to bring their own experiences of such devices and communication methods from a personal use perspective.
All the best,
Victor