An analysis is performed for electromagnetic safety of equipment of 4G/5G mobile communications for population and technical facilities of critical infrastructure: railway signaling and telecommunications equipment, medical short-range equipment, medical electrical equipment, and electrical equipment for measurement, control and laboratory use. It was established that radiations of 4G/5G systems are potentially dangerous for functioning of critical infrastructure equipment and the population. Recommendations aimed at reducing the danger of mobile communications for critical infrastructure objects and for population are given.