The base station and contents

Yes dear readers… The base station and the contents of the subject today. As we know, 5 kinds of main frequency base stations and the option is there. 800 Megahertz (800 MHz) – 0.8 GHz SDD 900 Megahertz (900 MHz) – 0.9 GHz SDD 1800 Megahertz (1800 MHz) – 1.8 GHz SDD 2100 Megahertz (2100 MHz) – 2.1 GHz…