Both 4G LTE and 5G-NR offer significant capabilities useful for building networks for public safety purposes. This may be an IoT network (NB-IoT or Cat-M) operating in 450 MHz or a national, sliced 5G-NR network operating in 700 MHz band. This may as well be a dedicated broadband network customized for Fire Brigades or any other combination of standardized 3GPP functionality and band available for operation. Open RAN in all these cases brings extreme flexibility, cost reduction, and unparalleled security. Yes, openness improves security! Not only it reduces the dependency on a single supplier but also it allows for the application of targeted security measures.