Where can I download an iPhone user manual / guide?

Apple has published iPhone user guides for several generations of iPhones. These support manuals can be viewed directly on your iPhone using the Apple iPhone in-browser user guide. This link will automatically display the manual that best matches your iPhone and operating system.

iPhone user guides are also released as PDF files which can be viewed on a computer or printed out for future reference. See a list of available user guides in PDF format below:

1. iPhone iOS 4.2 and 4.3
2. iPhone iOS 3.1
3. iPhone Enterprise Deployment Guide iOS 3.2 or later