Introduction
This manual provides detailed instructions for using your Apple iPhone 12, specifically the Docomo compatible model. It covers everything from initial setup and basic operations to advanced features and troubleshooting. Familiarize yourself with the contents to maximize your iPhone 12 experience.
The iPhone 12, released by Apple, offers a range of new features and improvements with iOS 14. This guide will help you understand and utilize these functionalities effectively.

Image: Overview of iPhone 12 and iOS 14 new features, including customizable home screen, widgets, and privacy reports.
Setup
This section guides you through the initial setup and essential configurations for your iPhone 12.
1. Basic Operations and Power Management
- Power On/Off and Sleep Mode: Learn how to turn your iPhone 12 on and off, and how to use the sleep mode.
- Learning Basic iPhone Operations: Understand gestures and navigation.
- Using the Home Screen: Customize and navigate your home screen.
- Checking Notifications with Notification Center: Access and manage your alerts.
- Utilizing Control Center: Quickly access settings and apps.
- Using Widgets: Add and manage widgets for quick information.
- Launching and Closing Apps: Manage your applications efficiently.
- Entering Text: Learn how to use the keyboard for text input.
- Editing Text: Understand text selection, copy, paste, and other editing functions.

Image: Instructions for powering on/off the iPhone 12 and managing sleep mode, showing button presses and screen prompts.
2. Performing Basic Settings
- Creating an Apple ID: Essential for accessing Apple services.
- Registering Payment Information to Apple ID: Set up payment methods for purchases.
- Setting up Docomo Mail: Configure your Docomo email account.
- Using Wi-Fi: Connect to wireless networks.

Image: Visual guide on how to make and receive calls on iPhone 12, including the phone app interface.

Image: Step-by-step process for creating an Apple ID on iPhone 12, showing input fields for personal information.
Operating Your iPhone 12
This section covers the daily use of your iPhone 12, from communication to entertainment.
1. Using Phone Functions
- Making and Receiving Calls: Basic call management.
- Checking Call History: Review incoming and outgoing calls.
- Creating Contacts: Add and manage your contacts.
- Checking Voicemail: Access and listen to your voicemails.
- Setting Call Rejection: Configure unwanted call blocking.
- Changing Volume and Ringtone: Adjust audio settings.
2. Utilizing Email Functions
- Types of Email Available on iPhone: Understand different email services.
- Using Messages: Send and receive SMS and iMessages.
- Using Convenient iMessage Features: Explore advanced messaging options.
- Using Mail: Manage your email accounts.
- Utilizing Mail: Advanced tips for email management.
- Taking Measures Against Spam Mail: Filter and block unwanted emails.
- Using PC Mail: Access and manage your computer-based email.

Image: Guide on how to use the Messages app on iPhone 12, showing the interface for sending and receiving texts.
3. Enjoying the Internet
- Browsing Web Pages: Navigate the internet using Safari.
- Displaying New Web Pages: Open new tabs and windows.
- Opening Multiple Web Pages Simultaneously: Manage multiple browser tabs.
- Using Bookmarks: Save and organize your favorite websites.
- Using Google Search: Perform web searches efficiently.
- Using Reading List: Save articles for offline reading.
- Checking Privacy Report: Understand website tracking.
- Using Private Browsing Mode: Browse without saving history.
- Saving Settings for Each Website: Customize site-specific preferences.

Image: Instructions for browsing the web using Safari on iPhone 12, demonstrating how to open and navigate web pages.
4. Enjoying Music, Photos, and Videos
- Purchasing Music: Acquire music through iTunes Store.
- Listening to Music: Play your music library.
- Using Apple Music: Explore the streaming service.
- Taking Photos: Use the camera to capture images.
- Recording Videos: Capture video footage.
- Viewing Photos and Videos: Browse your media library.
- Editing and Correcting Photos and Videos: Enhance your media.
- Deleting Photos: Remove unwanted images.

Image: Guide on how to purchase music from the iTunes Store on iPhone 12, showing the store interface and search options.
5. Mastering Apps
- Finding Apps in the App Store: Discover and download new applications.
- Installing and Uninstalling Apps: Manage your app library.
- Using Calendar: Organize your schedule.
- Using Reminders: Set and manage reminders.
- Using Notes: Create and manage notes.
- Using Translate: Translate languages.
- Using Maps: Navigate and explore locations.
- Using Files: Manage documents and files.
- Using Health: Track your health and fitness data.
- Using Suica with Apple Pay: Make payments with your iPhone.
- Using FaceTime: Make video and audio calls.
- Using AirDrop: Share files wirelessly.
- Operating iPhone by Voice: Use voice commands for control.

Image: Instructions for searching and finding apps in the App Store on iPhone 12, showing the search interface.
6. Making iPhone Easier to Use
- Customizing the Home Screen: Personalize your app layout.
- Changing Wallpaper: Update your device background.
- Customizing Control Center: Arrange quick access settings.
- Understanding Privacy Settings: Manage your data and permissions.
- Setting a Passcode for Screen Lock: Secure your device.
- Using Face ID: Unlock your iPhone with facial recognition.
- Changing Apple ID 2-Factor Authentication Number: Update security contact.
- Utilizing Notifications: Manage how alerts are displayed.
- Using Haptic Touch: Interact with your screen using pressure.
- Launching Apps with Back Tap: Assign actions to taps on the back of your iPhone.
- Using Alarms: Set and manage alarms.
- Using Search Function: Quickly find content on your iPhone.
- Using Bluetooth Devices: Connect and manage Bluetooth accessories.
- Using Internet Sharing: Share your iPhone's internet connection.
- Taking Screenshots: Capture your screen content.
- Changing Default Apps: Set preferred apps for certain functions.
- Using Other Apps While Playing Videos: Utilize Picture-in-Picture mode.
- Using Dark Mode: Change the system-wide appearance to a darker palette.

Image: Steps to change the wallpaper on iPhone 12, showing options for dynamic and still images.
Maintenance
Proper maintenance ensures the longevity and optimal performance of your iPhone 12.
1. Utilizing iCloud
- What You Can Do with iCloud: Understand iCloud's capabilities.
- Backing Up to iCloud: Secure your data with cloud backups.
- Setting iCloud Sync Items: Choose what data syncs to iCloud.
- Using iCloud Photos and iCloud Shared Albums: Manage your photo library.
- Using iCloud Drive: Store and access files in the cloud.
- Find My iPhone: Locate your device if it's lost or stolen.
2. Storage Management
- Managing Storage: Monitor and optimize your iPhone's storage space.
Troubleshooting
This section provides solutions for common issues and guides you through resetting your device.
1. Initializing and Resetting iPhone
- Force Restarting iPhone: Resolve unresponsive issues.
- Initializing iPhone: Erase all content and settings.
- Performing Initial iPhone Setup: Reconfigure your device after a reset.
- Restoring from Backup: Recover your data from a previous backup.

Image: Instructions for force restarting the iPhone 12, detailing the sequence of button presses.
Specifications
| Feature | Detail |
|---|---|
| Publisher | Gijutsu-Hyohron Co., Ltd. |
| Release Date | 2020/12/3 |
| Language | Japanese |
| Book Length | 288 pages |
| ISBN-10 | 4297118211 |
| ISBN-13 | 978-4297118211 |
| Product Weight | 360 g |
| Dimensions | 13 x 2 x 18.9 cm |
Warranty and Support
Information regarding product warranty and customer support is typically provided by the device manufacturer (Apple) or your service provider (Docomo) at the time of purchase. Please refer to the documentation included with your iPhone 12 or contact Apple/Docomo directly for specific warranty terms and support options.
This instruction manual does not contain specific warranty details or support contact information.
Official Product Videos
No official product videos from the seller are available for embedding in this manual.





