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5G cell connection in new updated model Y?

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So to support 5G, is there a physical change needed (i,.e., a new piece of hardware) or is it a software update? Or do we not know at this point?
Depends what modem they have in the SoC they are using. If I were to venture a guess, I think it would require a hardware change, because I don't think they would change something like the integrated modem on the SoC simply for supply chain reasons. That would still require new FCC filings and certifications for the new modem. So I doubt they would be shipping something right now that supports 5G but isn't being used. Look what happened with the S when LTE first came out... In order to support it, you had to go back and get a hardware update.