Leading up to the latter part of the year, the smartphone market has a tendency to blow up. This year is no different. There are a ton of new handsets coming down the pipe, and T-Mobile has already laid claim to many of them. With so many different high-profile smartphones coming down the pipe, it might be hard to pick one. But if you do, then T-Mobile promises to give you the best trade-in value for your old device to make getting that new phone even easier. The plan will start on September 17, and it will run for a limited time, but T-Mobile doesn’t outline when that will be: It’s a pretty simple endeavor, and T-Mobile says that they will be watching the market to keep an eye on pricing. However, if you do find a trade-in value higher than what the Magenta Network is offering, they’ll beat it outright, and then add an additional $50 on top of that for good measure. Do you plan on taking advantage of the deal?