I know this, and they suck (it's another freaking cord to carry around in your pockets), and it's unnecessary in the face of just getting a phone that doesn't need it!

I can't charge my phone and listen to stuff at the same time, and my headphone jack headphones work with every device but a new phone. Don't know why I would want to throw that convenience away all because Apple/every other manufacturer decided we should get rid of headphone jacks.