Alexander Graham Bell (born March 3, 1847 - died August 2, 1922) was most famous for his invention of the telephone in the summer of 1876. To create his device, he used common materials such as a thin sheet of metal, a coil of wire wrapped around a magnet and a battery. The device could convert sound into electricity and back into sound when it got to the other person. The device was first used between Bell and his partner Watson. Today, this invention makes communication a lot easier.