Before T-Mobile acquired Sprint, activists, consumer groups, and deal critics (including me) warned repeatedly that the telecom sector megadeal would result in layoffs, less competition, higher prices, and a lower quality product overall. The Trump FCC and DOJ very clearly didn’t care; they rubber stamped the deal without even reading deal impact reports.
T-mobile has been profitable every single year since 2013. Well before the merger.
https://www.macrotrends.net/stocks/charts/TMUS/t-mobile-us/eps-earnings-per-share-diluted#:~:text=T-Mobile US EPS for the twelve months ending December,a 9.06%25 decline from 2020.