Question: how to transfer pdf file into iphone?
Answer: 1Make sure you have the iBooks app installed on your iPhone. ... 
2Open iTunes on your computer. ... 
3In the iTunes library, click Books. ... 
4Make sure you can see your PDF via a file browser (such as Finder on Mac or Explorer on Windows) or as an icon on the desktop. ... 
5Drag and drop the PDF into your iTunes Book library.