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Millions of smart meters will fail when 2G and 3G turns off
(www.theregister.com)
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this post was submitted on 24 Oct 2023
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Frequency isn't that relevant, it's frequency bandwidth. The bit rate is n/T with n being bits per symbol and T symbol duration which itself is 1/B with B being the frequency bandwidth. You want to increase the bit rate you can either increase the number of bits per symbol or increase the frequency bandwith. 5G allows bandwiths up to 400MHz per channel, there isn't enough space in the lower frequency ranges for such large bandwidths, so you go up.