A lot of the commenters here seem to be missing the point: The Qualcomm chip on the phone supports Apt-X HD but Samsung purposefully chose to remove support for it, both to save a little in licensing fees, and so that if you want the best audio quality (highest bitrate and sampling rate) you have to buy Samsung earbuds, which after the only ones that support their own proprietary codec.
That's a cheap move, we're talking about their flagship devices not supporting the industry-leading BT audio codecs because they intentionally chose to disable them.