It's the Samsung Galaxy S8's big day, and that means there are deals for the taking. If you haven't already preordered the phone, now is your chance to jump on one of several promotions being offered by a handful of carriers, including things like a free handset, a buy-one-get-one deal, and/or low down payments. Most of these deals are limited-time offers and, in some cases, they require you to port a number over. Ready to take the plunge? Read on to find the best deal for you!