Effie Smith (born Effie Mae Blu or Bly, April 10, 1914 – February 11, 1977) was an American blues and jazz singer and comedian, best known for "Dial That Telephone", a song she first recorded in 1953 which became an R&B hit in 1965. Smith later worked in record promotion and A&R for Stax Records. She died from cancer in Los Angeles in 1977, aged 62.