When T-Mobile began offering to pay people’s early termination fees, it was a game-changing gambit. Now the company is giving even more incentive to switch by doubling the data cap on the already-affordable $50/month Simple Choice plan without altering the price. According to T-Mobile's official site:
Starting March 23, our $50 Simple Choice Plan gets double the 4G LTE data, unlimited international data and texting from 120+ countries and destinations, PLUS unlimited international texting from the US to virtually anywhere all at no extra charge.
Double the data only adds up to 1GB, which isn't a lot - especially if you stream videos often. But with light-to-moderate cellular data use, you'll last the month. Check out T-Mobile's comparison chart. Even with the fine print, it's still a relatively low price for mobile data.