T-Mobile says that it’s upgraded hundreds of cell sites with more mid-band LTE capacity over the last two weeks. These mid-band upgrades typically include both PCS and AWS spectrum.
The cities that’ve gotten mid-band LTE upgrades this time around are scattered throughout the U.S. They include Lincoln City, OR; Boston, MA; Wichita, KS; Jacksonville, FL; and San Jose, CA.
Source: https://www.tmonews.com/2019/09/t-mobile-deployed-mid-band-lte-capacity-upgrades/