5G future: Revisit our recent wireless past first

The mobile industry is cranking up its hype machine for sleek new “5G” networks that it says will make your phone and everything else faster and wonderful. If you believe the marketing.

But no one can really say how 5G will change your life; many of the apps and services that will exploit its speed haven’t been created yet. Look back at the last big wireless upgrade, though, and you can get a sense of how profound that change might be.