The Galaxy 6 and Edge have protection Stickers to cover Vital parts of the phone just like any new phone that comes to a Store or Arrives at your home but as Kellex pointed out the one that covers the Flash and HR is so matched to what it is protecting its Very hard to see and if you don't realize it there it once it sets in on what its protecting might actually leave a residue or it could hamper the Performance of the Plash or HR monitor..
So I'm adding this post to what Kellex mention here on the Forum so new owners can see and remove this safety sticker and enjoy the full use out of what the sticker is Covering..
Enjoy your New Phone
B33