Book excerpt: Whether you've just purchased a new iPhone 5c or 5s or you're coveting one from afar, let the editors at Macworld help you get to know Apple's newest smartphone. Take a tour of the device's exterior and basic features, and learn how to activate a brand new iPhone; discover basic gestures for navigating through apps and home screens; and get acquainted with key features like Siri, Mail, and Maps. Read up on your iPhone's default apps, tweak your settings, and find out how to download more programs from the App Store. And in case you're stumped on how to best outfit your device, we provide suggestions for great iPhone 5s and 5c cases, headphones, speakers, and more.