Seeing a call fail on your Nothing Phone (3) is a real nuisance, especially when you're trying to reach someone. This usually happens because your phone can't properly connect to your carrier's network. A weak signal, a minor software hiccup, or a setting that's out of place are the typical culprits.
Let's run through the most effective fixes, starting with the quickest ones you can try right now.
Toggle Airplane Mode
The fastest way to reset your cellular connection is by flipping Airplane Mode on and off. This clears out any temporary network glitches that might be blocking your calls. Swipe down from the top of your screen to open the Quick Settings panel and tap the airplane icon.
Wait about ten seconds, then tap it again to turn Airplane Mode off. Your phone will reconnect to the network, and you can try your call again immediately.
Check Your Signal Strength
Weak signal is the number one reason calls fail. Look at the signal bars or the icon in the top-right corner of your Nothing Phone (3) screen. If you only have one bar or see an "X," you're in a poor coverage area.
Try moving to a different room, going near a window, or stepping outside. Buildings, basements, and rural areas can all cause these dead spots.
Restart Your Nothing Phone (3)
A simple restart can clear up a surprising number of software-related issues, including call problems. Just press and hold the power button until the power menu appears, then tap "Restart."
If your screen is unresponsive, you can force a restart. Press and hold the Volume Down button and the Power button together for about 10 to 15 seconds until you see the Nothing logo appear on the screen.
Check Focus and Do Not Disturb
Your Focus modes or Do Not Disturb might be accidentally blocking calls. Swipe down from the top to check your Quick Settings. If you see a moon icon or a specific Focus icon like "Work" is highlighted, it means those modes are active.
Tap the icon to turn it off. You can also go into Settings > Sound & vibration > Do Not Disturb to make sure no schedules are interfering.
Update Date and Time Settings
Believe it or not, if your phone's clock is wrong, it can mess with network authentication. The easiest fix is to let your phone set the time automatically. Head to Settings > System > Date & time.
Make sure the switch for "Use network-provided time" or "Automatic date & time" is turned on. This syncs your phone with your carrier's time server.
Review Your Blocked Numbers
It's worth a quick check to make sure you haven't accidentally blocked the person you're trying to call. Open your Phone app and tap the three-dot menu in the top corner, then go to Settings > Blocked numbers.
If you see the number listed, you can tap on it and select "Unblock." After that, try placing the call again.
Verify Mobile Data and Network Mode
First, ensure your mobile data is actually enabled. Go to Settings > Network & internet > Mobile network and make sure "Mobile data" is toggled on. If you're traveling, you might also need to enable data roaming from this same menu.
Sometimes, the 5G or LTE network can be unstable for voice calls. You can try switching to 3G temporarily. In the Mobile network settings, tap "Preferred network type" and select "3G." Test your call, then switch it back to "5G/LTE" afterward.
Check for Carrier Updates
Your carrier occasionally sends small configuration updates that improve network connectivity. These can fix calling issues. Make sure you're connected to Wi-Fi, then go to Settings > System > System update.
Tap "Check for update." While this is primarily for OS updates, carrier updates are often bundled in or applied automatically in the background when you're connected.
Inspect Your SIM Card
A loose, dirty, or faulty SIM card is a common physical cause of call failures. Use the SIM ejector tool that came with your phone to pop out the tray. Carefully remove the SIM card and take a look at the gold contacts.
If they look dusty, gently wipe them with a soft, dry cloth. Reinsert the SIM card firmly into the tray, push the tray back in, and restart your phone. If you have another phone handy, testing the SIM card in it can tell you if the card itself is the problem.
Update Nothing OS
Software updates from Nothing frequently include bug fixes and improvements for network stability. Keeping your Phone (3) updated is one of the best ways to prevent issues. Connect to a stable Wi-Fi network and make sure your battery is above 50%.
Then, navigate to Settings > System > System update to download and install any available updates. I've seen many persistent glitches cleared up by a simple OS update.
Reset Your Network Settings
This is a more thorough step that clears all your saved Wi-Fi networks, Bluetooth pairings, and cellular settings back to default. It won't delete your personal data like photos or messages. Go to Settings > System > Reset options.
Tap "Reset Wi-Fi, mobile & Bluetooth." You'll need to enter your PIN or password to confirm. After the reset, you'll have to reconnect to Wi-Fi networks and re-pair Bluetooth devices, but it often resolves deep-seated network problems.
Contact Your Mobile Carrier
If you've tried everything here and calls are still failing, the issue is likely on your carrier's end. There could be a temporary network outage in your area, a problem with your account, or your SIM card might need replacing.
Give your carrier's customer service a call from a different phone if possible. They can check for outages, reprovision your line on their network, or send you a new SIM card. They can also confirm if there are any specific network settings you need for the Nothing Phone (3) on their service.