https://www.entrepreneur.com/article/343292

Last month, T-Mobile promised its 5G network would go live in 5,000 cities and towns on December 6th -- if its merger with Sprint went through. That deal is not yet final, but today, a few days ahead of schedule, T-Mobile says it's launching its nationwide 5G network. The catch is that, for now, T-Mobile is offering 600 MHz "low-band" 5G.

Related: 5 Lessons to Learn from T-Mobile CEO John Legere