Apple.com provides the official manuals for the iPhone 4s, as of 2015. The website offers safety, warranty and regulatory information and user guides for the iPhone 4s.
To access official manuals for the iPhone 4s, navigate to Apple.com. Click Support in the navigation bar, scroll down to the bottom of the page, and then click Manuals under Resources. Click on the Browse by Product button, and then enter "iPhone 4s" into the search bar. Alternatively, you can click on the iPhone product family icon. Scroll through the search results, click on the Load more results button if necessary, and then choose the manual that fits your needs.