https://www.cnet.com/news/samsung-sets-galaxy-s9-unveiling-for-feb-25-mwc-2018/

We already knew the global smartphone titan would drop the device at Mobile World Congress -- better known by its initials, MWC -- next month in Barcelona, the world's largest show for all things mobile. What we didn't have was a launch date. If you're keeping tabs, this Unpacked event shares the same time and weekday as Samsung's past phone unveilings at MWC: the Sunday night before the show officially kicks off. 

The Galaxy S9 will be all about the camera.