numerology. Class A belongs to all the fallback groups, thus allowing the mobile to return to a basic configuration without aggregation of carriers. 5G-NR Radio Interface - Operations on the Frequency Bands Class B corresponds to a total bandwidth between 400 MHz and 800 MHz from the aggregation of two radio channels. Class C corresponds to a total bandwidth between 800 MHz and 1200 MHz from the aggregation of two radio channels. Class B is a fallback configuration for class C, both of which belong to the same FallBack group 1 fallback list. Class D corresponds to a total bandwidth between 200 MHz and 400 MHz from the aggregation of two radio channels. Class E corresponds to a total bandwidth between 400 MHz and 600 MHz from the aggregation of three radio channels. Class F corresponds to a total bandwidth between 600 MHz and 800 MHz from the aggregation of four radio channels. Classes D, E and F belong to the same FallBack group 2 fallback list. Class G corresponds to a total bandwidth between 100 MHz and 200 MHz from the aggregation of two radio channels. Class H corresponds to a total bandwidth between 200 MHz and 300 MHz from the aggregation of three radio channels. Class I corresponds to a total bandwidth between 300 MHz and 400 MHz from the aggregation of four radio channels. Class J corresponds to a total bandwidth between 400 MHz and 500 MHz from the aggregation of five radio channels. Class K corresponds to a total bandwidth between 500 MHz and 600 MHz from the aggregation of six radio channels. Class L corresponds to a total bandwidth between 600 MHz and 700 MHz from the aggregation of seven radio channels. Class M corresponds to a total bandwidth between 700 MHz and 800 MHz from the aggregation of eight radio channels. Classes G, H, I, J, K, L and M belong to the same FallBack group 3 fallback list. NG-RAN and 5G-NR Class O corresponds to a total bandwidth between 100 MHz and 200 MHz from the aggregation of two radio channels. Class P corresponds to a total bandwidth between 150 MHz and 300 MHz from the