AT&T announced today that it will sell the Samsung Galaxy S5 for $199.99 with a two-year contract, or $649 without a contract. Although a launch date has not been set by AT&T for the flagship phone, AT&T customers can preorder the device starting March 21. During its Galaxy S5 Unpacked event last month at Mobile World Congress in Barcelona, Spain, Samsung announced that the device would launch globally on April 11.