Punishment
In Nazca Plateau City there was this kind of thing, technology, and many other things. But the cities in the desert were old cities that had none of that.
The reason for this is that the alliance government wants to test the inhabitants of the desert to see if any promising young people would appear. For living in the harsh and dangerous climate can select any powerful mages.
In the desert cities, they had basic and advanced technology, but not many. Only influential groups and large businesses had this kind of advanced stuff, ordinary people and mages had only the basics like cell phones and some other necessary communication things.
"Miss, do you know how to use these apps?" Tang Chen saw that the two women did not know how this worked.
"Yes." Sarina lived in the desert for a long time. But that doesn't mean she never used a cell phone before. She used more sophisticated things before when she was younger.