There is also a 3.5 mm stereo jack at the top of the handset. (pocket-lint.com)
Even with the added expense, it's hard to put a price on not having to physically attach the older version to a phone's stereo jack for each and every update. (techradar.com)
A 3.5 mm stereo jack is also included on the top of the phone, adding control functionality as well to the stereo headphones. (en.wikipedia.org)