This guide is designed for novices and advanced iPhone/iOS users alike. The tips and instructions here are tailored to the iPhone 6S / iPhone 6S Plus and iOS 9, but you'll find plenty of relevant information for older iPhone models and older versions of the software. Just be aware that iPhone 6S and iOS 9 have introduced quite a few new features that may not be available on older iPhones We've broken things down into six major parts. Part 1: Meet Your iPhone will help you unpack the box, learn how to interact with your iPhone, and glide through the set up process. Part 2: Getting to Know Your iPhone will introduce you to the basic features and navigational system of the device. Part 3: Mastering Your Preinstalled Apps will walk you through the twenty-eight preinstalled apps in detail to help you master what's available right out of the box. Part 4: Making It Your Own guides you through customization and personalization. Part 5: Maintenance and Security will help you keep your iPhone healthy and safe. Finally, Part 6: Must-Have Apps for Your iPhone includes a list of 52 of our favorite apps - we hope you enjoy them as much as we do There's a lot of information here, but don't feel like you need to absorb it all at once. Think of this guide as a friendly support system for you as you learn to use and enjoy this incredible piece of consumer technology. If you're new to iPhone or to iOS, start by reading through Parts 1 and 2. This should get you on your feet. Be sure to look at Part 5 to learn how to care for your new iPhone. You may want to use Parts 3, 4, and 6 as reference material. You can read them straight through from start to finish or just browse the table of contents for the information most helpful to you. These chapters will also be helpful for experienced users who want to get the most out of iPhone 6S and iOS 9. Few devices are as painless to use as the iPhone - we hope you have fun and enjoy the journey. Now let's get started