Apple's Latest iPhone Models Go On Sale Across U.S.
PALO ALTO, CA - SEPTEMBER 20: A customer looks at the new Apple iPhone 5S at an Apple Store on September 20, 2013 in Palo Alto, California. Apple launched two new models of iPhone: the iPhone 5S, which is preceded by the iPhone 5, and a cheaper, paired down version, the iPhone 5C. The phones come with a new operating system. (Photo by Justin Sullivan/Getty Images)