Go to Settings, select Sounds and vibration, and tap the Volume option. Move the Media slider all the way to the left to mute all sounds. Wait for 30 seconds, and then move the slider to the right. Check if the loudspeaker is working properly now.
Why does my phone suddenly have no sound?
Restart your phone: A simple reboot can be the solution for many problems. Clean the headphone jack: If you're having this issue only when the headphones are plugged in, try cleaning the jack. Also, try another pair of headphones, since it could be them causing the problem.
Why does my Android phone suddenly have no sound?
To begin with, try rebooting(Restarting) your device. Whether the issue may be in the app or your Android software, reboot your device to see if you can fix the no sound issue on your phone. If rebooting doesn't work, go for a complete factory reset to remove any existing cache and cookies.