Complex sentence: The design of the S5 evolves upon the design of the S4, with a rounded, polycarbonate chassis carrying a "modern glam" look, faux metal trim, and a removable rear cover.
Split into simpler sentences: The design of the S5 evolves upon the design of the S4. It features a rounded, polycarbonate chassis carrying a "modern glam" look, faux metal trim and a removable rear cover.