After 5G network is commercialized, the 4G phones will still function normally. The 5G phones allows for interoperability with 4G/3G/2G network . Therefore, 5G phones work with 4G network, as same as 4G phones work with 3G network.
After 5G network is commercialized, the 4G phones will still function normally. The 5G phones allows for interoperability with 4G/3G/2G network . Therefore, 5G phones work with 4G network, as same as 4G phones work with 3G network.