This manual might be helpful to someone with a previous knowledge of smartphones, but I purchased a used iPhone 5 as my introduction to this technology, not wanting to spend what a new version costs until (unless) I felt comfortable with the iPhone 5. Since the phone came without a manual, I searched online via Google for the manual. Apparently Apple doesn't continue to provide the manuals of older models in order to force people to buy their new ones. (Planned obsolescence.) This one came up in my search and listed the iPhone 5 series in the brief description, so I purchased it. Big mistake! This manual is like a textbook of 327 pages that goes through every aspect of iPhone, focusing on IOS 10. There is no index, and iPhone 5 is not mentioned in the table of contents, so I've skimmed through the book looking for it. I've found only a very few (less than 5) mentions of iPhone 5, so--NO--this manual is not in the least helpful. The phone I bought is still in a desk drawer, unused, until I can find even a used iPhone 5 manual. I do not intend to read this entire book in the hopes that I can learn how to use the model I own. I'll just keep using my old cellphone. Not everyone is a techie, and technical manuals should take fact that into consideration.