[header] How to use headphones on an iphone 7 [title] Locate your iphone's lightning port. [step] While the 3.5 millimeter headphone jack is gone, the traditional charging port--also known as the lighting port--is still at the bottom of your phone. You'll plug your lightning headphones cable into this slot. 
[title] Plug your headphones into the lightning port. [step] These should fit into the lightning port the same way your iphone 5 or 6 charger does.