If you are using a Bluetooth accessory, turn your Bluetooth off to check if this makes any difference.
#How to get malware off galaxy s5 how to
See instructions on how to do this below. You can use compressed air to blow into the hole and ensure that no crumbs or dust particles are blocking the sound.
On the Galaxy S5, this is the small hole towards the bottom of your handset. Leave the phone alone for some time, then replace the SIM card and the battery and turn the phone back on to see whether the problem has been resolved.
This will delete any temporary files which could be causing the problem. Restart your phone by holding down the power key until your device vibrates and turns off, then turn it back on.Remove your case or screen guard and see whether the issue has been resolved. Make sure that the protective case or screen protector you are using is not interfering with the touchscreen.