Resound Vivia - using Phone Mic problem

Hi Group.

I’ve have been using the new Vivia HAs with a new Samsung phones for four months. When making phone calls I have been able switch from the HA mic to the phone mic. This has been amazing. This worked in normal BT mode. I had tried BT LE but connection quality was always poor.

Then three days ago the option to use the phone mic in normal BT mode went away. I tried the following:

Changing all the options possible on the phone

Unpaired and repaired the HAs

Uninstalled the resound app

Updated the phone software -there was a pending update

Cleared cache

The mic option is available in BT LE which makes this might be a system issue. But it’s effectively not usable.

Help!!!