How It Works: Cell Phones

How It Works: Cell Phones book cover — Table of contents What Are Cell Phones 4 How Do Cell Phones Work 6 The Future of Cell Phones 18 Glossary 22 23 To Learn More Index 24

How It Works: Cell Phones — page 1 — What Are Cell Phones Cell phones are devices that help people communicate People all over the world use cell phones 4

How It Works: Cell Phones — page 2 — People use cell phones to make calls and send messages Some cell phones have games and other apps 5

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