<P> The iPhone 5S is a smartphone that was designed and marketed by Apple Inc . Part of the iPhone series , the device was unveiled on September 10 , 2013 , at Apple 's Cupertino headquarters . It was released on September 20 , 2013 , along with its lower - cost counterpart , the iPhone 5c . </P>
when did the i phone 5s come out
September 20 , 2013