It isn't like they switch off the old networks 3G, 4G etc when the next generation comes out. I also assume this cannot be fixed with a firmware update.
> In a paper proposing 6Genesis, director Matti Latva-aho explains "a new mobile generation appears every 10 years, and thus, 6G will emerge around 2030 to satisfy all the expectations not met with 5G, as well as new ones to be defined at a later stage."