10 km is what Google search says.
Indian govt is pushing handset makers for really high-speed 5g and not name sake 5g. This will need millimeter wave support. This is very high frequency (6GHz). Higher the frequency higher the attenuation will be, which will need more towers and more line of sight.
For better understand, take the case of home Wi-Fi routers which these days have 2.4Ghz and 5GHz support. 5ghz will provide guaranteed high speed but it’s range is limited when compared to 2.4ghz. When your phone moves away from the router the connection switches automatically from 5ghz to 2.4ghz.
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