If your OnePlus Open won't connect to your headphones, car, or smartwatch, it can feel like you're stuck with a wired world. Bluetooth issues on Android, including OxygenOS, are usually temporary glitches. I've found that starting with the simplest fixes often gets things working again without much hassle.
Toggle Bluetooth and Restart
First, pull down the quick settings shade from the top of your screen. Tap the Bluetooth icon to turn it off, wait about ten seconds, and then tap it again to turn it back on. This quick refresh can clear up a minor software hiccup. If that doesn't do it, a full restart is the next logical step.
Press and hold the power button for about ten seconds until you feel the phone vibrate and the screen goes black. Wait for the OnePlus logo to appear as it boots back up. Don't forget to also restart the Bluetooth device you're trying to connect to, as the problem could be on that end.
Check the Simple Stuff
It sounds obvious, but it's worth confirming a few basics. Make sure both your OnePlus Open and the accessory have enough battery, ideally above 20%. Keep them within a few feet of each other without any major obstructions.
Also, double-check that the other device is actually in pairing mode. For headphones, this often means holding a button until an LED flashes. For your car, you'll usually need to select "Add Phone" from the infotainment screen's Bluetooth menu.
Forget and Re-Pair the Device
If the device shows as paired but won't connect, or if pairing fails, you should remove it from your phone's memory and start fresh. Open the Settings app and go to Bluetooth & device connection > Bluetooth.
Find the troublesome device in your list of paired items and tap the settings gear icon next to it. Select Forget or Unpair. Once it's gone, put the accessory back into pairing mode and select it from the "Available devices" list on your Open to try pairing again.
Clear the Bluetooth System Cache
Corrupted temporary data can cause all sorts of connection problems. Clearing the Bluetooth cache is a safe, effective step that doesn't delete your paired devices. Go to Settings > Apps.
Tap "See all apps" and then the three-dot menu in the top right to select Show system apps. Scroll down and find "Bluetooth," then tap on it. Go to Storage & cache and tap Clear cache. Restart your phone afterward and test the connection.
Reset Your Network Settings
This is a more comprehensive step that resets all wireless radios, including Wi-Fi and mobile networks, back to their default states. It will erase all your saved Bluetooth pairings and Wi-Fi passwords, so be prepared to re-enter them.
On your OnePlus Open, navigate to Settings > Additional settings > Back up and reset. Tap on Reset phone and then select Reset Wi-Fi, mobile & Bluetooth. Confirm the action and enter your lock screen PIN if prompted. After the phone reboots, you can attempt to pair your devices from scratch.
Update Your Phone's Software
Software bugs that affect Bluetooth are common, and OnePlus frequently addresses them in updates. Make sure your Open is running the latest version of OxygenOS. Go to Settings > About device and tap on OxygenOS version.
Your phone will check for updates. If one is available, download and install it. It's a good idea to be connected to Wi-Fi and have your phone plugged into its 67W SUPERVOOC charger during this process. Also, check if the Bluetooth accessory itself has a companion app that offers a firmware update.
Boot Into Safe Mode
If a recently installed third-party app is interfering with Bluetooth, Safe Mode will help you find it. Press and hold the power button until the power menu appears. Then, tap and hold the "Power off" option on your screen.
You'll see a prompt to reboot to Safe Mode. Tap "OK." Once the phone restarts, you'll see "Safe Mode" in the bottom corner. Try your Bluetooth connection now. If it works perfectly in Safe Mode, a downloaded app is the likely culprit. Restart normally and try uninstalling apps one by one, starting with the most recent.
Consider a Factory Reset
This is your last resort before considering a hardware issue. A factory reset will erase everything on your phone, so you must back up any important photos, messages, and files first. Use Google's backup service or manually transfer files to a computer.
Once backed up, go to Settings > Additional settings > Back up and reset > Erase all data (factory reset). Follow the prompts to complete the process. After the reset, set up your phone as new and immediately test Bluetooth before restoring your apps and data.
