My in-laws are 88 and 90. They have a flip phone and mom carries it in her pocket. She’s also nearly deaf and refuses to wear her hearing aids. It makes any phone calls we exchange completely exhausting. Their phone’s volume buttons are on the outer edge of the phone and we continually find it all the way “down”. We’re thinking of removing the cover of that button to help cut down on the accidental pushing of the volume to low. Has anyone ever tried it?