As a business owner, what would be the advantage of building your own in-house communication system like the cartel... versus getting GrapheneOS burner phones with decent communication apps like SimpleX?
Let's assume you hire one of those packaged "private cell network" engineers, and they build you two base stations for like 10 grand. Wouldn't the costs far outweigh purchasing burner phones for each employee?
Is the selling point psychological, i.e. a 2G 2010s phone connected to a private cell network has less ways for a braindead employee to screw up in their OPSEC?