That fancy headphones will not come with every HTC 10
Sound was one of the subjects that HTC focused on HTC 10. Besides of having two boom sound speakers, HTC also included high-res headphones in the 10’s box. However, not every HTC 10 user will get these headphones.
If you are living in either USA or Canada, then HTC 10 will not include high-res headphones. It is not clear why HTC decided not to put headphones in US and Canada HTC 10s, but I think it is just a ridiculous choice.
@Ima_Legend191 The earbuds won't be included in box for the USA unlocked HTC 10 but will be available to purchase on our website soon.
— HTC USA (@HTCUSA) April 14, 2016