If you're missing notes on your iPhone, iPad, or iPod touch - Apple Support

Create Quick Notes anywhere on iPhone - Apple Support

iPhone User Guide - Apple Support

Add reminders on iPod touch - Apple Support (CA)

Select, cut, copy, and paste text on iPhone - Apple Support

Create and format notes on iPhone - Apple Support

Make and receive FaceTime calls on iPod touch - Apple Support (MY)

Recover deleted messages on iPhone - Apple Support

iPhone User Guide - Apple Support (CA)

Ask Siri on iPod touch - Apple Support

Get shows, movies, and more in the Apple TV app on iPod touch

Find settings on iPod touch - Apple Support (GE)

Search and organize your notes in folders on iPod touch - Apple

Notes 101: How to Sync Your Notes Across Multiple Devices « iOS