Pages for iPhone: how to add a page break?
Double-tap where you want the break to occur.
  Tap More button until you see Insert, tap it, then tap Line Break or Page Break.
  
  
  If you don’t see Page Break, your document is a page layout document and doesn’t use page breaks. In that case, open the document in Pages on your Mac, add a new page, then open the document again on your iOS device.


Pages for iOS (iPhone, iPod touch): Add line, page, and column breaks