On February 26, Samsung is scheduled to announce the Samsung Galaxy S9 along with the S9+, successors to the S8 and S8+. If you're in the market for a new Android smartphone, and want one with an actual headphone jack, you should take a peek at what's coming down the pike. It will also help you decide whether or not you want to sell your old phone to pay for it. Here's where to watch in real time.