Android Phone No Sound

• Check your phone's volume: Check that the volume level for the sound setting you're missing is set to the expected level. Be sure to check Settings then Sound & Vibration for general changes (ringtone, default notification), or tap the volume icons and the gear icon for individual volume sliders (media, alarm, calls).
• Turn off "Do Not Disturb" mode: Some settings, like Do Not Disturb will override the volume settings for incoming communications. You can check your DND settings through the Quick Settings, or the main Settings App and searching for Do Not Disturb.
• Disconnect your Bluetooth Devices: If you frequently use a bluetooth speaker or a set of bluetooth headphones, check to make sure that your phone isn't trying to connect to a Bluetooth audio device.
• Speaker obstructed: Debris in your phone's speakers can prevent audio from playing clearly. Clean the exterior of your phone, paying special attention to the speaker grills to ensuring it is free of dust and debris. If your phone is in a case, make sure that the case isn't obstructing the speaker.

Android phones, like other computerized devices, can encounter bugs and software conflicts that cause issues. These issues can arise from errors, third-party or side-loaded apps causing havoc, or damage to the operating system itself.

• Check individual application audio settings: If you’re encountering the issue only in a specific app, see if that app has any updates. App updates can be found in the Google Play Store by selecting your account avatar in the upper right corner, then selecting Manage apps & device.
• Update your OS: Android itself may also need an update. In the Settings menu, under General, there is a selection for Software updates.

• Perform a factory reset: If all else fails then this could be a case of faulty software, and it would be worth backing up your personal data, and attempting a factory reset of your phone to install a fresh copy of Android to your device.

If your phone features a headphone jack then it is likely that conductive debris may have become stuck in inside the port, or the pins may be deformed, causing the phone to believe that headphones are connected when they are not.

• Check the headphone jack for any debris: This can include bits of pocket lint, dust, and unnoticed bits of your headphone's audio jack inside the port. If you need to remove broken bits of headphone jack from the port, consider taking a look at this instructional video. iFixit also sells GripStick Extraction Tools for this specific purpose.
• Clean the headphone jack throughly: You can refer to this list of meathods to remove basic dust, debris, or corrosion from the inside of the jack.
• Replace the jack if damage is found: If all else fails, you'll need to replace the jack. iFixit sells replacement jacks for a wide range of Android Phones, and guides for your specific Android phone.

• Identify the speaker that is impacted: Most contemporary smartphones are equipped with at least two speakers: a smaller earpiece speaker and a more prominent main speaker located at the bottom of the device.
  • Test with various tasks on your phone: Make a phone call, test out the speaker phone, or listen to some music. Some newer Android phones have stereo speakers, so many functions should make use of both speakers.
• Replace the speaker as needed: Once you've determined which speaker is likely to be the faulty one, time to break out the tool kit and get fixing. The bottom speaker is generally replaceable all on its own, but the earpiece speaker may be part of the front facing camera assembly.

Some Android phones, like the Samsung Galaxy line of phones, don't use a direct wired connection between the main board and speakers, and instead use metal contacts that make contact with the main board or the USB-C board.

• Check for any signs of liquid damage: Look inside your phone for any signs of liquid, corrosion or damage to the metal contacts. Even small amounts of liquid damage can prevent your phones speakers from functioning properly. If you happen to find liquid damage you can clean up minor corrosion with isopropyl alcohole and gentle scrubbing with a cotton swab.
  • This solution shouldn’t be considered permanent, as corrosion will oxidize the metal contacts, reducing electrical conductivity and compromising the solder joints. However, it can restore functionality if you’re seeking a quick fix.
• Check the contacts for any damage: Check the contacts for any or damage. Even small chips or bends can prevent data transmission.

Your phone’s mainboard is responsible for processing all audio signals sent to the speakers. If the board’s hardware is malfunctioning or damaged, signals may not be transmitted to the speakers at all.

• Check for any signs of liquid damage: Board damage can result from contact with liquid, electric shock, or repeated bending and flexing from being shoved into your pocket. Look for signs of bending, liquid stains, burns, or loose components.
• Replace components as needed: If you’re feeling especially curious, the tiny bits and chips on the board can be repaired by microsoldering. Consider taking a look at iFixit's article on Microsoldering, and consider learning microsoldering from Jessa Jones.