If your iPhone 15 won't connect to your AirPods, car, or other Bluetooth accessories, it's a common hiccup that usually has a straightforward fix. The switch to USB-C and the latest iOS 26 can introduce a few new quirks, but you can almost always get things working again with a few simple steps.
Let's jump straight into the most effective fix first. Go to Settings > Bluetooth, find the device that's giving you trouble, and tap the blue info icon next to it. Then, tap Forget This Device and confirm. This completely clears the old connection profile. Put your accessory back into pairing mode and try to connect fresh from the Bluetooth menu.
Restart Your iPhone and the Bluetooth Device
It sounds basic, but a restart clears out temporary software glitches that can block connections. For your iPhone 15, press and quickly release the Volume Up button, press and quickly release the Volume Down button, then press and hold the Side button until you see the Apple logo appear.
Don't forget to restart the Bluetooth device you're trying to connect to as well. Power it off completely, wait a moment, and turn it back on. Once both devices are back up, attempt the pairing process again.
Check Your iPhone's Bluetooth Settings
Sometimes the issue is simpler than you think. Swipe down from the top-right corner to open Control Center and make sure the Bluetooth icon is blue. If it's gray, tap it to turn Bluetooth on.
Also, head to Settings > Bluetooth and ensure the switch at the top is green. I've seen cases where Bluetooth appears on in Control Center but is actually off in the main Settings app, which can cause confusion.
Update Your iPhone's Software
Running outdated software is a common cause of Bluetooth problems, especially with new accessories. Apple frequently releases updates that fix connectivity bugs. To check, go to Settings > General > Software Update.
If an update is available, tap Download and Install. It's best to do this while connected to Wi-Fi and with your phone plugged into power using a proper USB-C cable. This ensures the update completes without interruption.
Reset All Network Settings
This is a more thorough step that resets Wi-Fi networks and passwords, cellular settings, and VPN configurations back to their defaults. Most importantly, it completely refreshes your Bluetooth connections without deleting your personal data.
Go to Settings > General > Transfer or Reset iPhone. Tap Reset and then choose Reset Network Settings. You'll need to enter your passcode and confirm. After your phone restarts, you'll have to reconnect to Wi-Fi and re-pair all your Bluetooth devices.
Check for Interference and Distance
Bluetooth uses the same 2.4GHz radio frequency as many Wi-Fi routers, microwaves, and even some USB 3.0 devices. If your connection is choppy or keeps dropping, try moving away from other electronics.
Keep your iPhone 15 and the Bluetooth device within about 30 feet of each other, ideally with a clear line of sight. Walls and other obstacles can significantly weaken the signal. If you're trying to connect in a crowded area like an office or apartment building, interference is a likely culprit.
Forget Other Problematic Devices
Your iPhone 15 can remember many paired devices, but sometimes an old, corrupted pairing can cause issues with new connections. Go through your Bluetooth device list in Settings and "Forget" any devices you no longer use or that have had problems in the past.
This cleans up the connection history and can free up resources. After removing a few old devices, try pairing your current accessory again from scratch.
Check the Bluetooth Accessory Itself
Make sure the problem isn't with the other device. Verify that it's charged and in pairing mode—its indicator light should usually be blinking. Consult the accessory's manual for specific pairing instructions.
If possible, try connecting the problematic accessory to another phone or tablet. If it fails there too, the issue is likely with the accessory itself, not your iPhone. Also, check if the accessory has a companion app that might need a firmware update.
Consider a Software Restore
If you've tried everything else and Bluetooth is completely non-functional, a deeper software refresh might be needed. First, ensure you have a recent backup via iCloud or your computer.
Then, you can use a computer to restore iOS. Connect your iPhone 15 to a Mac or PC with a USB-C cable, put it into recovery mode, and choose the restore option in Finder or iTunes. This installs a clean copy of iOS 26, which can eliminate any deep-seated software corruption affecting Bluetooth.
