iPhone Bluetooth not working? 9 fixes for pairing problems

Bluetooth problems feel like an iPhone fault, but most of the time the phone is fine. The accessory is asleep, still tied to another device, or holding a stale pairing. This guide starts with those simple causes and moves toward resets only when they fail. Each step takes under a minute, so you can work through the list without much effort.

How to fix an iPhone with Bluetooth not working

Why does Bluetooth stop working on an iPhone?

Bluetooth is a short-range radio link between two devices that agree on a saved pairing. A failure can happen on either end or in the pairing record they share. The accessory may be off, flat, out of range or set to talk to a different phone. The iPhone may have Bluetooth switched off, a glitch after an update, or a pairing record that no longer matches what the accessory remembers. Interference from Wi-Fi routers, USB 3 hard drives and microwave ovens can also swamp the signal in the 2.4 GHz band. Knowing which side is at fault saves a lot of time, which is why the test with a second phone is so useful.

Settings versus Control Center: the Bluetooth switch trap

The Bluetooth icon in Control Center looks like an off switch, but it is not one. When you tap it, the iPhone disconnects from accessories for now and turns Bluetooth back on tomorrow. AirDrop, Apple Watch and some location features keep using the radio. If a device will not connect, go to Settings › Bluetooth and flip the real switch. Wait ten seconds, then switch it back on. That full cycle restarts the radio, which Control Center does not do.

Pairing mode: the step most people miss

A paired accessory that is not in pairing mode will not show up in the list of devices near you. Pairing mode is different on each product, and the light pattern is the clue. Many earbuds flash white or blue when you hold the button on the case for five seconds or more. Speakers often have a Bluetooth button with a symbol. Car stereos hide it in a Phone or Bluetooth menu. Keyboards and mice usually have a small connect button underneath. If your accessory has no light or screen, check the manual or the maker’s website for the exact button press. A device that connects automatically to a phone it already knows may never advertise itself to your iPhone, so disconnect it from the other phone first.

Accessory connected to another device

Many headphones and speakers connect to the last device they used. If that was a laptop, a tablet or a family member’s phone in the next room, your iPhone cannot take the connection. Turn Bluetooth off on those devices, or forget the accessory there. Some models can hold two connections at once, but they may switch between them in odd ways. If audio jumps to a different device mid-song, this is the reason. Keep only one device connected until the pairing is stable.

Forget the device and pair again

A saved pairing can go bad after an iOS update, a firmware update on the accessory or a factory reset on either side. The fix is to delete it on both ends. Open Settings › Bluetooth, tap the ⓘ next to the device and choose Forget This Device. On the accessory, clear its pairing list if it has that option. Many headphones do this when you hold the power button for 10 to 15 seconds. Then put it in pairing mode and add it again from the list. If the accessory keeps a list of remembered phones, delete the old entries so there is room for the new pairing.

Bluetooth problems with headphones, cars and smartwatches

• Headphones and speakers: check the accessory’s own app for firmware updates, and keep it away from USB 3 devices and routers while pairing.
• Cars: most head units store only a few phones. Delete old phones in the car’s menu, then pair fresh. See the guide on a Bluetooth that will not connect to your car.
• Smartwatches and fitness trackers: these often need their own companion app to stay linked. Open the app, allow Bluetooth permission and turn on background refresh.
• Keyboards and game controllers: some must be paired in a special mode and may need the battery replaced before they connect.

App permissions and Bluetooth sharing

Apps need your permission to use Bluetooth. If a fitness band or smart home gadget works in Settings but not in its app, go to Settings › Privacy & Security › Bluetooth and make sure that app has access. While there, check that you did not deny the permission when it first asked. Also remember that an iPhone connected to a hotspot, a Mac with Handoff or an Apple Watch can all compete for the same radio, so a very busy setup may behave badly until you remove some of them.

Reduce interference and keep a clear signal

Bluetooth shares the 2.4 GHz band with many home devices. A crowded router, a baby monitor or a nearby microwave can make audio skip or stop a connection from forming. Stay in the same room as the accessory during pairing and keep metal objects and your own body out of the direct line. If your earbuds work at home but cut out on the street, the cause may be a crowded area with many radios, not a broken phone. A case that blocks signal, such as a thick metal one, can also cut the range noticeably.

Update iOS and reset network settings

Apple fixes Bluetooth bugs in system updates, so install the newest iOS in Settings › General › Software Update. If that does not help, reset network settings under Settings › General › Transfer or Reset iPhone › Reset › Reset Network Settings. You will need to re-enter Wi-Fi passwords and pair your Bluetooth devices again, but no photos or apps are lost. It is a strong fix, because it clears the radio’s stored state. As a last software step, you can back up the iPhone and reset all settings, though that step is rarely required for Bluetooth alone.

When Bluetooth still won’t work: hardware and repair

If no accessory will pair with your iPhone, yet they all work with other phones, and the Bluetooth switch in Settings is greyed out, the problem may be in the phone itself. Water damage, a drop or a failed logic board part can stop the radio. Book a check at an Apple Store or an authorized repair provider and ask for a quote. Weigh the cost against the phone’s age, and look at your carrier’s trade-in and upgrade offers before paying for a big repair. A weak battery can also cause odd wireless behavior, so it is worth checking your iPhone’s battery health at the same time. If the trouble is with wireless earbuds only, read about AirPods that will not connect.