While the earlier technologies were perfected to create ever more advanced smartphones, 5G is designed not only to improve their performance, but mainly to link digital systems which need enormous quantities of data in order to work automatically. The most important 5G applications will not be intended for civil use, but for the military domain.

The possibilities offered by this new technology are explained by the Defense Applications of 5G Network Technology, published by the Defense Science Board, a federal committee which provides scientific advice for the Pentagon –

"The emergence of 5G technology, now commercially available, offers the Department of Defense the opportunity to take advantage, at minimal cost, of the benefits of this system for its own operational requirements".

In other words, the 5G commercial network, built and activated by private companies, will be used by the US armed forces at a much lower expenditure than that necessary if the network were to be set up with an exclusively military goal. Military experts foresee that the 5G system will play an essential role for the use of hypersonic weapons – missiles, including those bearing nuclear warheads, which travel at a speed superior to Mach 5 (five times the speed of sound). In order to guide them on variable trajectories, changing direction in a fraction of a second to avoid interceptor missiles, it is necessary to gather, elaborate and transmit enormous quantities of data in a very short time. The same thing is necessary to activate defences in case of an attack with this type of weapon – since there is not enough time to take such decisions, the only possibility is to rely on 5G automatic systems.