You're staring at your OnePlus 12, watching it stubbornly refuse to join your Wi-Fi network. That spinning icon is maddening, especially on a brand new 2024 flagship. I've seen this a few times with OxygenOS 14, and the good news is it's almost always a software quirk you can fix yourself.
Toggle Wi-Fi and Restart Your Phone
Start with the simplest fix. Swipe down from the top of your screen to open the Quick Settings panel and tap the Wi-Fi icon to turn it off. Wait about five seconds, then tap it again to turn it back on. This forces the phone to drop any stale connection data and start fresh.
If that doesn't work, give your OnePlus 12 a full restart. Press and hold the power button until the power menu appears, then tap "Restart." Let the phone boot up completely. A quick reboot clears out temporary glitches in OxygenOS that can block network connections.
Use Airplane Mode to Reset All Radios
This trick works on any phone, and it's worth a shot. Pull down your Quick Settings again and tap the airplane icon to enable Airplane Mode. This shuts down Wi-Fi, cellular, and Bluetooth all at once.
Leave it enabled for a solid 15-20 seconds. Then, tap the airplane icon again to turn it off. Your OnePlus 12 will re-initialize all its wireless hardware, which often knocks loose whatever was preventing the Wi-Fi from connecting.
Forget the Problem Network and Rejoin
Your phone might be holding onto incorrect login details for your network. To clear them out, go to Settings > Wi-Fi & Internet. Tap on the name of the network you're trying to join, then select Forget.
Now, go back to the list of available networks and tap on yours again. Re-enter the Wi-Fi password carefully, making sure caps lock isn't on. This is the most common fix if you've recently changed your router or its password.
Check for Router or Password Issues
It's easy to overlook, but make sure you're selecting the correct network. If you have a dual-band router, you might see both a 2.4GHz and a 5GHz network with similar names. Try connecting to the other one to see if it works.
Also, double-check the password on another device that's already connected. If you've entered it wrong even once, your OnePlus 12 will often keep trying the incorrect version.
Temporarily Disable Bluetooth
Bluetooth and Wi-Fi can sometimes interfere with each other on the 2.4GHz band. It doesn't happen often, but it's a quick thing to test. Swipe down and tap the Bluetooth icon in your Quick Settings to turn it off.
Now try connecting to Wi-Fi again. If it works, you've found a simple conflict. You can usually turn Bluetooth back on afterward, and both will function normally.
Turn Off Smart Wi-Fi Switcher
OxygenOS has a feature designed to save battery by switching to mobile data when your Wi-Fi signal is poor. Ironically, it can sometimes prevent a connection altogether. To check it, go to Settings > Wi-Fi & Internet > Wi-Fi preferences.
Look for an option called Smart Wi-Fi Switcher or Auto-switch to mobile data and make sure it's turned off. This stops your phone from second-guessing the Wi-Fi network.
Disable Any Active Power Saving Modes
Battery saver modes are aggressive on modern phones. They can limit background network activity, which includes the process of establishing a Wi-Fi connection. Open Settings > Battery.
See if Power Saving Mode or Super Power Saving Mode is enabled. If it is, switch it off. Your Wi-Fi should attempt to reconnect immediately once the battery restrictions are lifted.
Update Your OnePlus 12 Software
Outdated system software is a common source of connectivity bugs. OnePlus regularly releases updates that fix these kinds of issues. Go to Settings > About device > OxygenOS version and tap on the top banner that says "Check for update."
If an update is available, install it. Make sure your phone is connected to a cellular network or, if possible, use another phone as a hotspot to download it. After the update installs and your phone restarts, try your Wi-Fi again.
Verify Your Date and Time Settings
This one seems odd, but it's important. If your phone's clock is wrong, it can fail security checks when trying to join a secured Wi-Fi network. Go to Settings > Additional settings > Date & time.
Ensure that both Use network-provided time and Use network-provided time zone are toggled on. This syncs your OnePlus 12 with the correct time automatically.
Reset Your Network Settings
If you've tried everything else, this is your next major step. A network reset clears all Wi-Fi passwords, Bluetooth pairings, and cellular settings back to factory defaults. Go to Settings > Additional settings > Backup & reset.
Tap on Reset phone, then select Reset Wi-Fi, mobile & Bluetooth. Confirm the reset. After your phone reboots, you'll need to re-enter all your Wi-Fi passwords and re-pair Bluetooth devices, but it often solves persistent connection problems.
Restart Your Wi-Fi Router
Don't forget that the issue might not be your phone at all. Unplug your router and modem from power. Wait a full minute, this is important to let the memory clear completely.
Plug the modem back in first and wait for all its lights to stabilize. Then plug the router back in. Once your home network is fully back online, try connecting your OnePlus 12 again. If other devices were also having trouble, the router was likely the culprit.
Boot Into Safe Mode to Check for App Conflicts
A third-party app you installed could be interfering with network functions. To test this, you need to boot into Safe Mode. Press and hold the power button until the power menu appears.
Then, tap and hold the "Power off" option on your screen. A prompt will appear asking if you want to reboot to Safe Mode. Tap "OK." If your Wi-Fi works perfectly in Safe Mode, a recently installed app is causing the problem. You'll need to uninstall apps one by one to find the offender.
