The recently announced iPhone 4S will be available not just for AT&T and Verizon, but also for Sprint.Sprint Nextel Corp. will offer Apple Inc.'s iPhone next month with unlimited data service plans to distinguish itself from rivals AT&T Inc.Apple and U.S. carrier partners AT&T, Sprint, and Verizon Wireless all began accepting preorders for the iPhone 4S at 12:01AM Pacific time on.Apple unveiled the iPhone 4S at an event held at their Cupertino headquarters.
