T-Mobile isn't going to sit by the wayside while its carrier rivals talk up plans for 5G networks. The magenta crew has announced that it plans to roll out a nationwide 5G network starting in 2019, with completion by 2020. It'll use some of the provider's 600MHz frequencies to help make this speedy service happen. And yes, this will be real, standards-based 5G -- not the faux 5G (really an amalgam of upgrades to 4G) AT&T launched in April. The news is bound to make you happy if you're eager for a wireless internet connection faster than your landline service at home, although it's important to be cautious. Like most hyped-up network upgrade, there's some context you're not getting.