Samsung has officially announced the Galaxy S8 Active with the rugged phone being exclusive to AT&T for a limited time before it will presumably be available on other US carriers as well as off-contract. During the launch period, there are numerous deals available that are focused on encouraging the purchase of other Samsung products or AT&T services.
https://www.notebookcheck.net/Galaxy-S8-Active-is-now-official-and-it-releases-tomorrow-on-AT-T.240362.0.html