When your brand new Galaxy S26 Ultra goes silent, it can throw you off. You might miss calls, have no media playback, or get no sound from notifications. Since this is a 2026 device running One UI 8.5, some early software quirks are possible, but most audio problems have straightforward fixes.
Check Your Volume and Sound Mode
First, press the volume up button on the side of your phone. If you see a volume slider on screen but still hear nothing, the issue might be deeper. It's also worth checking your quick settings panel by swiping down from the top of the screen twice.
Look for a sound mode icon. Make sure it's not set to Vibrate or Mute. If it is, tap it to switch back to Sound mode. You can also press and hold the volume down button until it switches out of silent mode.
Disconnect Bluetooth and Accessories
Your S26 Ultra might be routing audio to a paired device. Open Settings > Connections > Bluetooth and turn the toggle off. Also, disconnect any USB-C headphones or accessories, as the phone can sometimes get stuck outputting sound through the physical port.
If you use a case, especially a rugged one, try removing it temporarily. A poorly designed case can partially block the bottom speaker grill or the top earpiece, muffling sound significantly.
Clean the Speaker Grills
Dust and pocket lint love to collect in the speaker openings. The S26 Ultra's S Pen slot is right next to the USB-C port and bottom speaker, and debris from there can easily migrate. Gently brush the speaker grills at the top and bottom of the phone with a soft, dry toothbrush.
You can also use a can of compressed air, but hold it upright and use very short bursts. Never insert anything sharp like a pin into the grill, as you can permanently damage the speaker diaphragm behind it.
Review Advanced Sound Settings
Samsung's software has several layers of audio controls. Go to Settings > Sounds and vibration. First, tap on 'Volume' and make sure all sliders, like Media, Ringtone, and Notifications, are turned up.
Next, go back and look for 'Separate app sound'. If this is enabled, it routes audio from a specific app (like YouTube) to a different output, which can sometimes cause the main speakers to seem dead. Toggle it off to test.
Also check Settings > Accessibility > Hearing enhancements. Ensure that options like 'Mute all sounds' or 'Left/right sound balance' sliders set to one extreme aren't accidentally enabled.
Perform a Force Restart
A simple reboot clears temporary glitches. For the Galaxy S26 Ultra, press and hold the Volume Down button and the Side/Power button simultaneously for about 10 seconds. Release when you see the Samsung logo appear on the screen.
This forces the phone to shut down and boot fresh, which can resolve minor software hiccups, including those early OS bugs that might affect audio drivers.
Check for Software Updates
Samsung is quick to push updates for new devices. An update might already exist to fix audio issues. Go to Settings > Software update > Download and install.
Make sure your phone is connected to Wi-Fi and has sufficient battery. If an update is available, installing it could patch the exact problem you're experiencing. I'd do this after a force restart, as it's a common fix for new-model gremlins.
Boot Into Safe Mode
This starts your phone with all third-party apps disabled. If sound works in Safe Mode, a recently downloaded app is the culprit. To enter Safe Mode on the S26 Ultra, first turn the phone off completely.
Press and hold the Side/Power button until the Samsung logo appears, then immediately press and hold the Volume Down button. Keep holding it until you see 'Safe mode' in the bottom left corner of the screen. Test your sound with a YouTube video or ringtone.
To exit, just restart your phone normally. If sound works here, you'll need to uninstall apps one by one, starting with the most recent, to find the offender.
Clear the System Cache
Corrupted cache files from the system partition can cause all sorts of odd behavior. You'll need to use the Recovery Mode menu. First, power off your S26 Ultra completely.
Connect it to your computer with a USB-C cable. Then, press and hold the Volume Up and Side/Power buttons together. Release them when the blue 'Installing system update' screen appears, then quickly release and press both buttons again to enter Recovery Mode.
Use the Volume buttons to highlight 'Wipe cache partition' and press the Power button to select it. Confirm, then select 'Reboot system now'. This doesn't delete any personal data.
Reset All Settings
If a specific setting is causing the conflict, this will revert everything to factory defaults without touching your photos, messages, or apps. Go to Settings > General management > Reset > Reset all settings.
You'll need to enter your PIN or password. Confirm the action. After the phone reboots, you'll have to reconfigure things like Wi-Fi passwords, wallpapers, and display settings, but it often resolves persistent, confusing issues like no sound.
