As part of a new Brain Health feature, Samsung is testing the ability for its phones to analyze day-to-day signals — from how you walk and how you sleep and even how your voice sounds — to determine early signs associated with cognitive…

As part of a new Brain Health feature, Samsung is testing the ability for its phones to analyze day-to-day signals — from how you walk and how you sleep and even how your voice sounds — to determine early signs associated with cognitive…