<page_title> List of iOS devices </page_title> <section_title> iPhone </section_title> <table> <cell> iPhone 3GS <col_header> Model </col_header> </cell> <cell> iPhone 4 <col_header> Model </col_header> </cell> <cell> iPhone 4S <col_header> Model </col_header> </cell> </table>
IPhone 4 is the fourth generation iPhone, succeeding the 3GS and preceding the 4S.