Samsung is currently offering a pretty compelling deal on the Galaxy S8 through their own website. They are selling the Galaxy S8 (T-Mobile models) on a buy one, get one free deal. The "free" part comes in the form of an instant rebate after activating both on T-Mobile's network. So you aren't getting a monthly credit from the carrier to keep you on their network for 24 months, which makes this the best BOGO deal ever for a smartphone. Unfortunately they are only doing this for the T-Mobile variants and not other models on other carriers.
This deal from Samsung still includes the free "Entertainment kit" which gives you a Clear View stand, a 64GB micro SD card and six months of Netflix for free. The Galaxy S8 is the smaller of the two smartphones Samsung has announced this year. It sports a 5.8-inch display, which has a 18.5:9 aspect ratio, making it much taller, but also taking up the majority of the front of the device. The Galaxy S8 is powered by the Qualcomm Snapdragon 835 chipset, along with 4GB of RAM and 64GB of storage. There's also a micro SD card slot available for expanding the storage as well. Finally, there's a 3000mAh battery inside.
Samsung's website does not say how long this deal will be going on for, but it does say that it's a limited time thing. So you don't have long to take advantage of this deal before it's gone. And if you're looking to upgrade your device, this is definitely a deal that's worth getting in on.