My Lumia 822 Speakerphone just stopped working. Will not function with phone calls, voice memo app, nor Cortana. Worked fine until 48 hours ago. Have uninstalled/reinstalled voice memo app and completed a soft reset without success in resolving the issue. Is there a setting that mutes the Speakerphone function that I am missing, or is there another thing to try - other than a Hard Reset, that is a LAST resort!!