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I hoped 5G would be like 4G but with much more speed, lower latency, and more area covered by one antenna.

But it seems it won't deliver.

It's hard to deliver both higher speed and longer range, because higher frequencies don't reach as far and don't penetrate walls as well.

But what I read about 5G is that its range is comparable to wifi.

Why do they do that?

AFAIK, the speed is >gigabit fast, but to achieve that speed you need to have super high frequencies and hence smaller range.

To me, it seems inconvenient as a replacement for 4G. However it is also being used for other applications; like self-driving cars[1].