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Galaxy S4

Samsung's new Galaxy S4 is seen during its unveiling on March 14, 2013 at Radio City Music Hall in New York. (credit: Don Emmert/AFP/Getty Images)

Samsung Challenges iPhone With New Galaxy S4

Samsung Electronics is ratcheting up its rivalry with Apple with its new Galaxy S 4 smartphone, which has a larger, sharper screen than its predecessor, the best-selling S III.

03/15/2013