When people can't hear you on your Nothing Phone (3), it turns simple calls and voice notes into a frustrating game of charades. The issue could be anything from a blocked microphone grill to a software setting that got flipped. Let's start by figuring out which mic is acting up, as the Phone (3) has several for different tasks.
Test Your Nothing Phone (3) Microphone
Open the Recorder app that comes pre-installed on your phone. Tap the red record button and speak normally for about ten seconds. Play it back. If your voice sounds muffled or isn't there at all, you've confirmed the problem.
You can also make a quick test call to your voicemail. Speak a clear sentence and listen back. If the audio is broken or silent, it points to the primary call microphone being the culprit.
Remove Your Phone Case First
This is the easiest thing to check. Some cases, especially bulky ones designed to show off the Glyph Interface, can accidentally cover the microphone pinholes. Take the case off and make another test recording. I've seen this fix more issues than you'd think.
While the case is off, take a close look at the bottom edge of the phone and near the camera module. Look for any lint, dust, or debris clogging the tiny microphone openings. A can of compressed air can gently blow this out.
Disconnect Bluetooth Accessories
If your Nothing Ear or any other Bluetooth headphones are connected, your phone will route all audio through them by default. This includes the microphone. Swipe down from the top of your screen to open the Quick Settings panel and tap the Bluetooth icon to turn it off temporarily.
Then, try your microphone again. If it works now, you know the issue was audio routing. You can go into Settings > Connected devices and forget that specific device, then re-pair it fresh.
Check App Microphone Permissions
Apps like WhatsApp, Discord, or Zoom need explicit permission to use your mic. If you denied this accidentally, or a recent update reset it, the app will be silent.
Go to Settings > Apps > See all apps. Find the app giving you trouble and tap on it. Select Permissions and make sure the Microphone permission is set to "Allow." While you're there, force stop the app and reopen it, as a glitchy app cache can sometimes cause this.
Restart Your Nothing Phone (3)
A simple reboot clears out temporary system glitches that can affect hardware like the microphone. Press and hold the power button until the power menu appears, then tap "Restart."
If the phone 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. Release when you see the Nothing logo appear on the screen.
Clean the Microphone Openings Carefully
Over time, pocket lint and dust can get packed into the microphone pinholes. Don't use a paperclip or anything metal. A brand-new, soft-bristled toothbrush is perfect for this.
Gently brush over the microphone areas at the bottom of the phone and near the rear cameras. You can also use a toothpick, but be extremely careful not to apply any pressure inward. The goal is to dislodge debris, not push it further in.
Update Nothing OS
Software bugs are a common cause of audio issues, and they're often patched in updates. Nothing is pretty good about pushing regular optimizations for the Phone (3).
Head to Settings > System > System update and tap "Check for update." If an update is available, install it. Make sure your phone is connected to Wi-Fi and has at least a 50% charge before you start.
Check for Water or Moisture Damage
The Nothing Phone (3) has some water resistance, but it's not foolproof. If the phone was recently exposed to moisture, it could trigger a liquid detection warning and disable the microphone for safety.
Look for a water droplet icon in the status bar. If you see one, power the phone down completely and leave it in a dry, warm place (not on a heater) for at least a full day to dry out thoroughly.
Reset All Network and App Settings
This is a deeper fix that won't delete your personal data like photos or messages. It resets Wi-Fi, Bluetooth, and cellular settings, along with all app permissions. It can clear up conflicts causing the mic to fail.
Go to Settings > System > Reset options. Tap on "Reset Wi-Fi, mobile & Bluetooth." After it completes, you'll need to reconnect to your Wi-Fi networks and re-pair Bluetooth devices, but it's often worth it.
Perform a Factory Reset
Consider this your last resort before looking at a hardware repair. A factory reset will erase everything on your phone and return it to its out-of-the-box state. You must back up your data first.
Go to Settings > System > Reset options > Erase all data (factory reset). Follow the prompts. After the phone reboots, set it up as new initially and test the microphone before restoring your backup, just to rule out corrupted data.