If your Nothing Phone (3) is refusing to connect to your headphones, car, or speaker, it can really throw off your day. Bluetooth issues are frustratingly common, but the good news is they're usually a quick software fix. Since you're running Nothing OS 3.0, I'd start with the simplest solutions first, as they often do the trick.
Before you try anything more involved, run through this quick checklist. Make sure both your phone and the device you're trying to connect to have enough battery, ideally above 20%. Check that the other device is actually in pairing mode, which often involves holding a button until a light flashes. Keep them within a few feet of each other to rule out distance issues.
It's also worth testing your Phone (3) with a different Bluetooth gadget. If it connects to one but not the other, you've narrowed the problem down to the specific device. If it won't connect to anything, then the issue is almost certainly with the phone itself.
Toggle Bluetooth and Restart
The absolute first thing to try is the classic off-and-on-again. Swipe down from the top of your screen to open the Quick Settings panel and tap the Bluetooth icon to turn it off. Wait about ten seconds, then tap it again to turn it back on. Now try pairing your device again.
If that doesn't work, a full restart is the logical next step. For the Nothing Phone (3), you'll press and hold the Volume Down and Power buttons together for about 10 to 15 seconds. Keep holding until you see the Nothing logo appear, then let go. This force restart can clear out temporary glitches that a simple toggle won't fix.
Don't forget to restart the Bluetooth device you're trying to connect to as well. Power it down completely, wait a moment, and turn it back on. Once both devices are fresh, attempt the pairing process from the beginning.
Forget and Re-Pair the Device
Sometimes a pairing gets corrupted. The best fix is to wipe the slate clean and start over. On your Nothing Phone (3), go to Settings > Connected devices > Previously connected devices. You'll see a list of everything you've paired with before.
Find the troublesome device in the list and tap the settings gear icon next to it. Then, tap Forget. This removes all the connection data from your phone. Now, put the other device back into its pairing mode and search for it again from your phone's Bluetooth settings. This fresh handshake often solves stubborn connection problems.
Clear the Bluetooth System Cache
Android's system services, including Bluetooth, store temporary data in a cache. If this cache gets corrupted, it can cause all sorts of connectivity hiccups. Clearing it is safe and won't delete your personal data or paired devices.
To do this on your Nothing Phone (3), open Settings > Apps. You might need to tap "See all apps" first. Look for "Bluetooth" in the list, it's a system app, so you may need to search for it. Tap on it, then select Storage & cache. Tap the "Clear cache" button and confirm. Afterward, restart your phone and test Bluetooth again.
If clearing the cache doesn't help, you can take the more thorough step of clearing the Bluetooth app's data. This will forget all your paired devices, so you'll have to set them up again. From the same Storage & cache menu, tap "Clear storage" or "Clear data". Confirm, restart your phone, and then re-pair your devices from scratch.
Check for a Software Update
Nothing is pretty good about pushing regular software updates to optimize performance and fix bugs. A Bluetooth connectivity issue could very well be something they've already patched in a newer version of Nothing OS.
Go to Settings > System > System update and tap "Check for update". If an update is available, I'd recommend installing it while connected to Wi-Fi and with your phone plugged into its official 65W charger. After the update completes, give your phone another restart and see if your Bluetooth problems are resolved.
Also, check if the device you're trying to connect to has a companion app (like for headphones or a smartwatch). Open that app and look for a firmware update section. Updating the accessory's firmware can improve compatibility with newer phones like the Phone (3).
Reset Your Network Settings
This is a more comprehensive step that resets all wireless communications on your phone back to factory defaults. It will erase your saved Wi-Fi networks, Bluetooth pairings, and mobile network settings, but it won't touch your personal files like photos or messages.
On the Nothing Phone (3), navigate to Settings > System > Reset options. Tap on Reset Wi-Fi, mobile & Bluetooth. You'll be asked to enter your PIN or pattern for security. Confirm the reset. Your phone will reboot, and you'll need to re-pair your Bluetooth devices and reconnect to Wi-Fi. This often clears up deep-seated network conflicts.
Boot Into Safe Mode
If Bluetooth suddenly stopped working after you installed a new app, that app could be the culprit. Safe Mode temporarily disables all third-party apps, letting you test the core system. To enter Safe Mode on the Nothing Phone (3), press and hold the power button until the power menu appears.
On the power menu, tap and hold the "Power off" option. After a second, a prompt will ask if you want to reboot into Safe Mode. Tap "OK". Your phone will restart, and you'll see "Safe Mode" in the bottom corner. Try using Bluetooth now. If it works perfectly in Safe Mode, you know a downloaded app is causing the interference.
Restart your phone normally to exit Safe Mode. Then, start uninstalling your most recently downloaded apps one by one, testing Bluetooth after each removal, until you find the problematic one.
