Last time on our explainer show Upscaled, we took a look at 5G ... choice of network would also determine the phones you could use, and many cell phone models only launched on a single network ...

2019 is going to be the year of 5G—at least ... were retroactively given the name "1G." Since then, we've gotten new "G" numbers with major coordinated network upgrades about every 10 years.