Your headphones won't connect.
Your car suddenly doesn't recognize your iPhone.
A Bluetooth speaker you've used a hundred times refuses to pair.
Or your accessory appears under Bluetooth settings but sits there displaying:
Not Connected.
Bluetooth problems can be particularly annoying because there are always two devices involved.
Your iPhone might be the problem.
The accessory might be the problem.
Or both devices might be working perfectly but have a pairing or configuration issue between them.
Before deleting settings or assuming your iPhone's Bluetooth hardware has failed, let's determine which side of the connection is actually causing the problem.
First: What Kind of Bluetooth Problem Do You Have?
"Bluetooth isn't working" can mean several different things.
Identifying the exact symptom makes troubleshooting much easier.
The Device Doesn't Appear
Your iPhone can't discover the Bluetooth accessory at all.
The Device Appears but Won't Connect
You can see it under Bluetooth settings, but tapping it doesn't establish a connection.
Pairing Fails
Your iPhone attempts to pair but reports an error or never completes the process.
The Device Connects and Disconnects
Pairing succeeds, but the connection isn't stable.
It Says Connected but Doesn't Work
Bluetooth appears connected, but audio or another expected function doesn't work.
One Bluetooth Device Doesn't Work
Everything else connects normally except one particular accessory.
These are different problems.
Let's isolate yours.
1. Make Sure Bluetooth Is Turned On
Start with the obvious.
Open:
Settings → Bluetooth
Make sure Bluetooth is enabled.
Your iPhone should begin displaying nearby Bluetooth devices.
If the accessory you've previously paired appears under My Devices, check its status.
You may see:
Connected
or:
Not Connected
If it's listed as Not Connected, tap it and see whether the connection succeeds.
2. Make Sure the Bluetooth Device Is Turned On
Bluetooth requires both devices to participate.
Make sure the accessory:
- Is powered on
- Has sufficient battery
- Isn't asleep
- Is actually ready to connect
A dead pair of headphones isn't an iPhone Bluetooth problem.
Neither is a speaker that's turned off.
Check the accessory before changing anything on your phone.
3. Put the Accessory Into Pairing Mode
This is one of the most common causes of Bluetooth pairing problems.
Many Bluetooth accessories are not permanently discoverable.
They need to be placed into pairing mode.
Depending on the device, this may involve:
- Holding a Bluetooth button
- Holding the power button
- Opening a charging case
- Pressing multiple buttons
- Selecting Pair Device from another menu
Check the manufacturer's instructions for the accessory.
If the device isn't discoverable, your iPhone may have nothing to connect to.
4. Move the Devices Closer Together
Bluetooth is a short-range wireless technology.
For troubleshooting, put the iPhone and accessory near each other.
Don't test from across the house.
Distance, walls, interference, and the accessory itself can affect connection quality.
If the connection becomes reliable when the devices are close together, range or interference deserves investigation.
5. Check Whether the Accessory Is Connected to Something Else
This causes a ridiculous number of Bluetooth problems.
Suppose your headphones were previously paired with:
- Your Mac
- Your iPad
- Another iPhone
- Your partner's phone
- Your work laptop
They may automatically reconnect to one of those devices before your iPhone gets the chance.
Temporarily disconnect the accessory from other nearby devices.
Then try connecting it to the iPhone again.
Suddenly Works?
Your iPhone wasn't necessarily the problem.
The accessory was already occupied by another connection.
6. Turn Bluetooth Off and Back On
Open:
Settings → Bluetooth
Turn Bluetooth off.
Wait several seconds.
Turn it back on.
Then try connecting the accessory again.
For troubleshooting, we prefer going directly through Settings → Bluetooth so you can see the actual Bluetooth status and available devices.
7. Toggle Airplane Mode
Airplane Mode gives us another quick way to reinitialize wireless connections.
Turn:
Airplane Mode ON
Wait several seconds.
Then turn:
Airplane Mode OFF
Make sure Bluetooth is enabled afterward.
Try the accessory again.
If it connects, the issue may have been a temporary wireless condition.
8. Restart Your iPhone
Restart the iPhone normally.
Once it starts again:
Settings → Bluetooth
Wait for the accessory to appear.
Then reconnect.
If everything works afterward, stop.
You fixed the problem.
There's no need to continue resetting things just because this article has more steps.
9. Restart the Bluetooth Accessory
Don't forget the other half of the connection.
Turn the accessory completely off.
Wait several seconds.
Turn it back on.
Put it into pairing mode if necessary.
Then try connecting again.
Bluetooth troubleshooting should involve both devices, not just the iPhone.
10. Forget the Bluetooth Device and Pair It Again
If an accessory you've previously used refuses to connect, remove the saved pairing and establish a new one.
Go to:
Settings → Bluetooth
Find the accessory under My Devices.
Tap the information button beside it.
Choose:
Forget This Device
Confirm.
Then put the accessory back into pairing mode and pair it with your iPhone again.
This creates a fresh Bluetooth relationship between the devices.
Before You Forget a Device
Make sure you know how to put the accessory back into pairing mode.
This is especially important with:
- Car stereos
- Older headphones
- Specialty accessories
- Medical or fitness accessories
- Devices with unusual pairing procedures
Don't remove something you don't know how to reconnect.
Check the manufacturer's instructions first.
11. Test Another Bluetooth Device
This is one of our favorite diagnostic tests.
Try connecting your iPhone to another Bluetooth accessory.
For example:
- Headphones
- Speaker
- Car
- Keyboard
- Controller
Other Bluetooth Devices Work
Your iPhone's Bluetooth system is probably functioning.
Focus on the original accessory.
Nothing Connects
Now an iPhone-specific problem becomes more plausible.
This is the Bluetooth equivalent of testing another Wi-Fi network.
12. Test the Accessory With Another Device
Now reverse the test.
Take the problematic Bluetooth accessory and connect it to another compatible phone, tablet, or computer.
Accessory Fails Everywhere
The accessory becomes the likely problem.
Accessory Works Everywhere Except Your iPhone
Focus troubleshooting on the iPhone or the pairing between those two devices.
These comparison tests are extremely useful because they isolate the failure.
13. Check the Accessory's Battery
A Bluetooth accessory with a nearly dead battery may behave strangely.
You may experience:
- Failed pairing
- Frequent disconnects
- Audio interruptions
- Reduced range
- Failure to power on correctly
Charge the accessory.
Then test again.
This sounds simple because it is.
Simple causes still count.
14. Check for an iOS Update
Open:
Settings → General → Software Update
Review whether an update is available.
Software updates can contain fixes and compatibility improvements.
If the Bluetooth problem started immediately after an iOS update, however, don't immediately factory reset your phone.
Restart both devices.
Forget and re-pair the accessory.
Test another Bluetooth device.
Continue diagnosing.
15. Check for an Accessory Firmware Update
Your iPhone isn't the only device running software.
Many modern Bluetooth accessories have firmware of their own.
That includes:
- Headphones
- Speakers
- Cars
- Controllers
- Hearing devices
- Smart accessories
Depending on the product, firmware updates may be delivered through:
- Manufacturer app
- Computer software
- Built-in update system
- Automatic background updates
Check the manufacturer's support information.
An old accessory firmware version may cause compatibility problems with newer operating systems.
16. Reset Network Settings
If Bluetooth problems affect multiple accessories, you've restarted everything, and basic troubleshooting hasn't worked, you can consider resetting network settings.
Go to:
Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings
Remember:
This isn't the same as erasing your entire iPhone.
But it does reset network-related configuration, so be prepared to reconnect to Wi-Fi networks afterward.
Don't start here.
Use it after simpler Bluetooth troubleshooting has failed.
Why Won't My iPhone Find a Bluetooth Device?
First make sure the accessory is actually discoverable.
Ask:
- Is the device turned on?
- Does it have enough battery?
- Is pairing mode enabled?
- Is it already connected to another device?
- Is it close enough to the iPhone?
If all five answers look good, restart both devices and try again.
Then test whether your iPhone can discover another Bluetooth accessory.
Why Does My Bluetooth Device Say "Not Connected"?
Seeing an accessory under My Devices means your iPhone remembers the pairing.
It doesn't necessarily mean the accessory is currently available.
The device may be:
- Turned off
- Out of range
- Connected elsewhere
- Low on battery
- Not ready to connect
Turn the accessory on and bring it close to the iPhone.
Then tap it under:
Settings → Bluetooth
Why Does Bluetooth Connect and Then Disconnect?
An unstable Bluetooth connection can be caused by:
- Distance
- Low accessory battery
- Wireless interference
- Accessory firmware
- Another device taking over the connection
- Pairing problems
- Software issues
Start by moving the devices close together.
Then restart both.
Forget and re-pair the accessory.
Finally, test another Bluetooth device.
Again, we're trying to determine whether the instability follows the iPhone or the accessory.
Why Do My Bluetooth Headphones Keep Disconnecting?
Headphones frequently remember several devices.
Your headphones might be jumping between:
- iPhone
- iPad
- Mac
- Laptop
- TV
Disconnect or temporarily disable Bluetooth on nearby devices you've previously paired with the headphones.
Then test them with only the iPhone.
Also make sure the headphones are adequately charged.
Why Are My AirPods Not Connecting?
AirPods use Bluetooth, but Apple integrates them more deeply into the ecosystem than generic Bluetooth headphones.
If AirPods specifically refuse to connect while other Bluetooth devices work normally, the problem may be AirPods-specific rather than an iPhone Bluetooth failure.
Check:
- AirPods battery
- Charging case
- Pairing status
- Apple Account/device configuration
- Whether they connect to another Apple device
AirPods connectivity deserves its own dedicated article later in this cluster:
AirPods Not Connecting to iPhone? Here's How to Fix It
That lets us target the specific search instead of stuffing every AirPods problem into a generic Bluetooth article.
Why Won't My iPhone Connect to My Car?
Cars can be particularly tricky because the vehicle has its own Bluetooth system and saved-device list.
Check whether:
- Bluetooth is enabled on the car
- The car is in pairing mode
- Your iPhone is already saved
- Another phone connected automatically
- The vehicle has reached its saved-device limit
You may need to remove the iPhone from the car and remove the car from the iPhone before pairing again.
And remember:
Bluetooth and CarPlay are related but not identical.
A CarPlay problem may require different troubleshooting.
We'll eventually cover:
Apple CarPlay Not Connecting to iPhone? Here's How to Fix It
Why Does Bluetooth Audio Connect but No Sound Plays?
If Bluetooth shows Connected but audio still comes from the iPhone speaker, check your audio output.
Open Control Center and review the active audio destination.
Make sure the Bluetooth headphones or speaker are selected.
The Bluetooth connection itself may be working perfectly—the audio may simply be routed somewhere else.
Also check the volume on both devices.
Some accessories have independent volume controls.
Why Is Bluetooth Audio Cutting Out?
Intermittent audio can result from:
- Distance
- Interference
- Low accessory battery
- Device switching
- Accessory problems
- Software issues
Bring the accessory close to the iPhone.
Charge it.
Disconnect other devices.
Restart both.
Then test again.
If the accessory cuts out when connected to every device, the accessory deserves more attention than the iPhone.
Can Wi-Fi Interfere With Bluetooth?
Wi-Fi and Bluetooth both use wireless radio frequencies, and crowded wireless environments can sometimes contribute to interference.
That doesn't mean you should permanently disable Wi-Fi whenever you use Bluetooth.
Instead, look at the environment.
Does Bluetooth work perfectly everywhere except one location packed with wireless devices?
That's useful information.
Again:
Location-specific problem → investigate the environment.
Everywhere problem → investigate the devices.
Why Does Bluetooth Work With One Device but Not Another?
That's actually good news.
If your iPhone connects perfectly to several Bluetooth accessories, its Bluetooth functionality is clearly doing something correctly.
Focus on the accessory that fails.
Check:
- Compatibility
- Pairing mode
- Firmware
- Existing connections
- Saved pairing
- Manufacturer instructions
Don't reset your entire iPhone because one ten-year-old Bluetooth speaker refuses to cooperate.
Bluetooth vs. AirDrop
AirDrop uses multiple wireless technologies to discover nearby Apple devices and transfer content.
So if AirDrop isn't working, don't assume Bluetooth alone is responsible.
Our upcoming guide:
AirDrop Not Working on iPhone? Here's How to Fix It
will cover AirDrop specifically.
That's another reason we're separating this Connectivity section by actual user symptom rather than lumping everything under "wireless problems."
Bluetooth vs. Personal Hotspot
Personal Hotspot can also involve Bluetooth, Wi-Fi, or USB depending on how devices connect.
If Bluetooth works but another device can't use your iPhone's internet connection, that's primarily a Personal Hotspot problem.
Continue with:
iPhone Personal Hotspot Not Working? Try These Fixes
which is the next article in this batch.
Bluetooth vs. Apple Watch
Apple Watch communicates with your iPhone using Bluetooth and Wi-Fi as part of Apple's broader connectivity system.
If Bluetooth headphones work perfectly but your Apple Watch doesn't connect, don't immediately assume the iPhone's Bluetooth hardware failed.
Troubleshoot the Watch connection specifically.
That gives us another future article opportunity:
Apple Watch Not Connecting to iPhone? Here's How to Fix It
Should You Factory Reset Your iPhone?
Not because one Bluetooth accessory refuses to connect.
Before considering something that disruptive:
- Restart the iPhone.
- Restart the accessory.
- Forget and re-pair it.
- Test another Bluetooth device.
- Test the accessory with another device.
- Check for updates.
- Reset Network Settings if appropriate.
If your headphones fail with every phone and computer you own, erasing your iPhone obviously isn't going to repair the headphones.
Diagnose first.
Could the iPhone's Bluetooth Hardware Be Broken?
Potentially.
Hardware becomes more plausible if:
- No Bluetooth devices work
- Wi-Fi also behaves abnormally
- Bluetooth becomes unavailable
- Network resets don't help
- iOS is current
- The iPhone suffered physical or liquid damage
If Bluetooth works with some devices but not others, hardware failure becomes less likely.
At that point, compatibility or accessory-specific problems deserve more attention.
Quick Bluetooth Troubleshooting Checklist
If Bluetooth isn't working on your iPhone:
- Make sure Bluetooth is enabled.
- Make sure the accessory is powered on.
- Charge the accessory.
- Enable pairing mode.
- Move the devices closer together.
- Disconnect the accessory from other devices.
- Turn Bluetooth off and back on.
- Toggle Airplane Mode.
- Restart the iPhone.
- Restart the accessory.
- Forget and re-pair the device.
- Test another Bluetooth accessory.
- Test the accessory with another device.
- Check for an iOS update.
- Check for accessory firmware updates.
- Reset Network Settings if necessary.
- Consider service if Bluetooth fails across multiple known-good accessories.
Don't change everything at once.
Test after each major step.
That's how you figure out what actually solved the problem.
Frequently Asked Questions
Why isn't Bluetooth working on my iPhone?
Common causes include the accessory not being in pairing mode, low battery, distance, another active connection, saved pairing problems, software issues, or network configuration.
Why can't my iPhone find my Bluetooth device?
Make sure the accessory is turned on, sufficiently charged, close to the iPhone, and placed into discoverable or pairing mode.
Why does my Bluetooth device keep disconnecting?
Possible causes include low battery, distance, interference, another device taking over the connection, firmware problems, or a corrupted pairing.
Why does Bluetooth say connected but there's no sound?
Check your iPhone's audio output and make sure the Bluetooth device is selected as the playback destination.
Why do my headphones connect to my laptop instead of my iPhone?
The headphones may automatically reconnect to another previously paired device. Disconnect them from that device and try the iPhone again.
Will Reset Network Settings delete my photos?
No. Reset Network Settings isn't the same as erasing your iPhone, although network-related configuration will be reset.
Does Bluetooth use Wi-Fi?
Bluetooth and Wi-Fi are separate wireless technologies, although some Apple features use both as part of the same feature or connection process.
Should I replace my iPhone if Bluetooth isn't working?
Not based on one accessory. Test several known-good Bluetooth devices before considering an iPhone hardware problem.
Continue With iPhone Connectivity Issues
This article is part of the iPhone4Idiots iPhone Connectivity Issues section.
Already covered:
- iPhone Won't Connect to Wi-Fi? Here's How to Fix It
- iPhone Wi-Fi Keeps Disconnecting? Here's How to Fix It
- iPhone Connected to Wi-Fi but No Internet? Here's What to Do
- Cellular Data Not Working on iPhone? Here's How to Fix It
- What Does SOS Only Mean on iPhone and How Do You Fix It?
Coming next:
- iPhone Personal Hotspot Not Working? Try These Fixes
- AirDrop Not Working on iPhone? Here's How to Fix It
- iPhone Won't Connect to 5G? Here's What to Check
And if poor connectivity is affecting your battery life, visit our iPhone Battery Help section for our complete battery troubleshooting guides.
Final Thoughts
Bluetooth troubleshooting becomes much easier when you stop treating the connection as an iPhone-only problem.
There are always at least two devices involved.
So test both sides.
Does your iPhone connect to another Bluetooth accessory?
Does the problematic accessory connect to another phone?
Those two tests can tell you more than repeatedly toggling Bluetooth ever will.
If every other accessory works with your iPhone, investigate the accessory.
If no Bluetooth accessory works with your iPhone, investigate the iPhone.
That's the same troubleshooting philosophy we're using throughout the entire Connectivity Issues section:
Isolate the failure first. Fix the right thing second.
