https://www.techdirt.com/articles/20210907/10581247517/att-whines-about-spectrum-hoarding-now-that-t-mobile-is-doing-it.shtml

Economists predicted the T-Mobile merger would result in a lot of layoffs, something that's been proven true so far. Those same economists also predicted that the merger will also inevitably result in higher prices for consumers, though that's expected to take a few years as investors pressure the three remaining companies to take advantage of reduced competition.

One good thing about the merger for T-Mobile and its subscribers is that it did provide T-Mobile with a whole lot of spectrum, allowing the company to dramatically boost overall network capacity. That has quickly resulted in T-Mobile customers seeing some significant speed increases across the T-Mobile network.