Most of the talk at MWC 2018 so far has focused on smartphones and tablets, but today T-Mobile has some 5G news to drop.

T-Mobile will begin building out its 5G network in 30 US cities in 2018, including New York City, Dallas, Los Angeles, and Las Vegas. The 5G coverage will include 600MHz spectrum as well as millimeter wave (mmWave) spectrrum.

When it comes to devices that you can use to actually get on that 5G network, the wait will be a bit longer. T-Mobile says that the first 5G smartphones will launch in early 2019.

It's also worth mentioning that just because T-Mobile is focusing on building out 5G doesn't mean that its investment in 4G LTE coverage is suddenly going to end. In fact, T-Mobile plans to deploy 25,000 small cells with License Assisted Access, which will grow both network capacity and speed.