So let's try this again.
T-Mobile is having a sale! "Magenta Saturday" is one day only, this Saturday, November 19th. You will save money, but it's complicated. Pay attention.
T-Mobile has two totally different sets of plans. There's "Classic Unlimited," which is a regular cell phone plan. You get a two year contract with a subsidized phone. Then there's the "Unlimited Value Plan" which is usually about $20 cheaper a month, but they don't subsidize your device.