https://arstechnica.com/information-technology/2017/09/t-mobiles-unlimited-plan-will-soon-let-you-use-50gb-before-slowdowns/

T-Mobile USA will soon let subscribers to its unlimited data plans use at least 50GB of data each month before risking slowdowns in congested areas.

All four major nationwide carriers slow down their heaviest data users when they connect to congested cell towers. But while Verizon Wireless and AT&T set the potential throttle point at 22GB, and Sprint at 23GB, T-Mobile is already letting customers use at least 32GB a month before risking slowdowns.