Samsung Galaxy S9 may come with Bluetooth AKG headphones in the box
http://www.techradar.com/news/samsung-galaxy-s9-may-come-with-bluetooth-akg-headphones-in-the-box
If you buy a Galaxy S8, Galaxy S8 Plus or Galaxy Note 8 you'll get a free pair of Samsung earbuds that are "tuned by AKG", but a new rumor suggests the headset in the box of the upcoming Galaxy S9 may be significantly better.
According to the rumor - from Ice Universe, who supplied accurate information ahead of the Galaxy Note 8 launch - the headphones supplied in the box with the new flagship phone will work via Bluetooth.