This article explains a few different ways to connect headphones to the iPhone 8, which doesn't have a built-in headphone jack.
How to Connect AirPods to iPhone 8 (AirPods Pro / AirPods) (iPhone 8 / 8 Plus)
No, the iPhone 8 series follows the example of its predecessor, the iPhone 7 series, by not having a traditional headphone jack. Neither the iPhone 8 nor the iPhone 8 Plus have a headphone jack. All iPhone models since then have also lacked a headphone jack.
Like the iPhone 7, iPhone 8 owners have three ways to connect headphones: the Apple Earbuds that come with the iPhone 8, wireless headphones (AirPods or Bluetooth), and an adapter for the standard headphone jack.
The iPhone 8 comes with a pair of Apple earbuds included in the box. These earbuds, called EarPods, plug into the Lightning port on the bottom of the iPhone. If you like these headphones, they’re a great option. The only downside is that you can’t do anything else with the Lightning port, like charge or sync your phone, while you’re using them. But if you like them, you don’t need to buy an adapter or a pair of wireless headphones.
