You need a Lightning to 3.5mm adapter, or your iPhone model may have one built in
Most iPhones from 2016 onward do not have a 3.5mm headphone jack, so wired headphones need an adapter to work. Apple sells a Lightning to 3.5mm headphone jack adapter for around $9, and many third-party versions cost less. If your iPhone is older — an iPhone 6s, 6, or earlier — it has a headphone jack built into the bottom, and you can plug wired headphones in directly without any adapter.
Before you buy an adapter, check which iPhone model you own. Go to Settings > General > About and look at the "Model Name" line. If it says iPhone 6s or earlier, you have a headphone jack. If it says iPhone 7 or later, you need an adapter.
Once you have the right adapter or confirm you have a headphone jack, the connection itself is straightforward — there is no pairing step or settings menu to navigate, the way there is with Bluetooth headphones.
Key Takeaways
- iPhones from iPhone 7 onward require a Lightning to 3.5mm adapter to use wired headphones; iPhone 6s and earlier have a built-in headphone jack.
- The adapter plugs into the Lightning port at the bottom of your iPhone, and your headphones plug into the other end.
- Wired headphones work when ready after you plug them in — no pairing, no settings changes, and no app needed.
- If your headphones do not produce sound, check that the adapter is fully seated in the Lightning port and that the headphone plug is fully inserted into the adapter.
- Some adapters include a charging port so you can charge your iPhone while using wired headphones at the same time.
Plugging in the adapter and headphones
Take the Lightning to 3.5mm adapter and push it firmly into the Lightning port at the bottom center of your iPhone. You will feel a slight click or resistance as it seats. The adapter should sit flush with the phone — if it is sticking out at an angle, remove it and try again, making sure the Lightning connector is aligned with the port.
Once the adapter is in place, take your wired headphones and insert the 3.5mm plug into the round opening on the other end of the adapter. Push it in until you hear or feel a click. The headphones are now connected and ready to use. You do not need to open any settings or wait for the phone to recognize them.
If you are using a case on your iPhone, the case opening around the Lightning port may be tight. If the adapter does not fit, you may need to remove the case temporarily, or look for a case with a larger opening designed for accessories.
Testing the connection and adjusting volume
Open any app that plays sound — the Music app, YouTube, a podcast app, or even a voice memo — and press play. You should hear audio through the headphones when ready. If you do not hear anything, check that both the adapter and the headphone plug are fully inserted, and that the volume is turned up on your iPhone.
Adjust the volume using the physical volume buttons on the side of your iPhone. The volume level you set will explore to the headphones. You can also adjust volume within some apps — for example, the Music app has its own volume slider — but the physical buttons are the quickest way.
If one earbud is quieter than the other, or if you hear no sound in one ear, the problem is usually a loose connection. Remove the headphones, check that the 3.5mm plug is clean and free of lint, and reinsert it firmly into the adapter.
Using the adapter while charging your iPhone
A standard Lightning to 3.5mm adapter blocks the Lightning port, so you cannot charge your iPhone while using wired headphones with that adapter. If you need to charge and listen at the same time, you have two options: use a dual Lightning adapter that has both a headphone jack and a charging port, or switch to wireless headphones.
Dual adapters cost more than single adapters — usually $20 to $40 — but they let you do both at once. Plug the dual adapter into your Lightning port, then plug your charging cable into the charging port on the adapter and your headphones into the headphone jack. The adapter will pass power through to your iPhone while the headphones play sound.
Be aware that not all dual adapters work equally well. Some users report that certain models cause the iPhone to charge slowly or not recognize the charger. If you plan to buy one, look for reviews that mention charging speed and stability.
What to do if the headphones do not work
If you plug in the headphones and hear nothing, start by checking the physical connections. Remove the headphones from the adapter and look at the 3.5mm plug — it should be shiny metal, not tarnished or corroded. If it looks dirty, wipe it gently with a dry cloth. Then reinsert it into the adapter, pushing until you feel resistance.
Next, check the adapter itself. Remove it from the iPhone and look at the Lightning connector — the metal pins should be clean and visible. If they look dark or corroded, try cleaning them gently with a dry cloth or a cotton swab. Reinsert the adapter into the iPhone, making sure it clicks into place.
If the headphones still do not work, try a different pair of wired headphones if you have one available. This tells you whether the problem is with your original headphones or with the adapter. If a different pair works, your original headphones may be damaged. If neither pair works, the adapter may be faulty, and you should try a different adapter.
Some adapters are not compatible with all iPhone models or iOS versions, though this is rare. If you are using an older adapter with a newer iPhone, or vice versa, try borrowing a newer adapter from a friend to rule this out.
Caring for your adapter and headphones
The Lightning to 3.5mm adapter is small and straightforward to lose. Keep it in a small pouch, a coin pocket, or a dedicated spot in your bag so you know where it is. If you use wired headphones regularly, consider buying a second adapter to keep at home or in your car.
When you are not using the headphones, coil the cable loosely and store it away from heat and moisture. Avoid wrapping the cable tightly around the adapter or the headphone plug, as this can damage the internal wires over time. If the cable becomes frayed or the plug becomes loose, the headphones may stop working or produce intermittent sound.
The adapter itself is durable, but the Lightning connector can wear out if it is inserted and removed hundreds of times. If you find yourself plugging and unplugging the adapter many times a day, a dual adapter or wireless headphones may be more practical in the long run.
Frequently Asked Questions
Can I use any 3.5mm headphones with the adapter?
Yes. Any wired headphones with a standard 3.5mm plug will work with the Lightning to 3.5mm adapter. This includes earbuds, over-ear headphones, and headphones with built-in microphones. The adapter does not care what brand the headphones are or how old they are.
Will the adapter work with headphones that have a microphone?
Yes. Headphones with a built-in microphone and a single 3.5mm plug will work for both listening and recording. The microphone will be recognized automatically when you use voice recording apps, video apps, or phone calls. You do not need to change any settings.
What if I lose the adapter?
You can buy a replacement Lightning to 3.5mm adapter from Apple, from electronics retailers like Best Buy or Target, or from online marketplaces. Third-party adapters are usually cheaper than Apple's version and work just as well. Make sure the listing says it is compatible with your iPhone model before you order.
Can I use a USB-C to 3.5mm adapter instead?
No. iPhones use the Lightning connector, not USB-C. A USB-C adapter will not fit into your iPhone's port. If you have a USB-C adapter from another device, it will not work with your iPhone. You need a Lightning to 3.5mm adapter specifically.
Do I need to turn on Bluetooth for wired headphones to work?
No. Wired headphones do not use Bluetooth at all. They connect through the physical adapter and the Lightning port. Bluetooth can be on or off — it makes no difference to wired headphones. You do not need to pair them or open any settings.