Samsung has had its own dedicated Unpacked events in recent years to talk about its new flagship phones, but this year it's doing the deed at Mobile World Congress in Barcelona. Unpacked and the probable Galaxy S7 announcement is now official for Sunday, February 21st at 7PM local time (doors open an hour earlier). That works out to 1PM on the East Coast in the US for the start of the event.
Samsung's teaser video doesn't tease very much. There's a floating cube, someone using a Gear VR, and a hashtag. I'm sure the specifics will be made available at the event, but we have a pretty good idea what some of them will be. Expect a Snapdragon 820 (at least in some regions) the return of the microSD card slot, and maybe a USB Type-C port.
It'll probably be a few weeks after announcement before you can buy the new Samsung flagship, but March 11th has been rumored as the big day. We'll keep you appraised of all the details as the event unfolds. Unpacked will be streamed live on Samsung's YouTube channel too.