Those of us who've had the opportunity to know the deaf or blind/visually impaired have had a small glimpse into an entirely new world where connectively tools must work differently.  The deaf "hear" with their eyes and the blind "see" with their ears.  As a consequence, mobile phones that rely on both audio and visual functions rarely serve their needs straight out of the box.  To address this a variety of helpful mobile apps have entered the market and are revolutionizing communications for the deaf and blind.