Here's everything you need to know about iPhone, in a handy digital format. Get to know iPhone and discover all the amazing things it can do, and how to do them. It's the definitive guide for getting the most from your new iPhone, straight from Apple. The iPhone User Guide is an essential part of any iBooks library.
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How to read the iPhone user guide book?
I don't know how to change language of this book.May I know can you explain to me.
reader-friendly. Very useful
reference "bible "