Smart phone
by Hoi Lam TONG
1. Definition
1.1. mobile phone
1.2. mobile operating system
1.3. mobile app
2. Function
2.1. entertainment
2.1.1. games
2.1.2. movie
2.1.3. music
2.2. tools
2.2.1. camera
2.2.2. calculator
2.2.3. maps
2.2.4. torch
2.2.5. alarm
2.2.6. dictionary
2.3. social
2.3.1. facebook
2.3.2. instragram
2.3.3. whatsapp
2.3.4. snapchat
2.3.5. email
2.3.6. phone call
3. Popular Brand
3.1. Samsung
3.2. LG
3.3. Sony
3.4. HTC
3.5. Apple
4. Mobile operating system
4.1. IOS
4.1.1. apple store
4.2. android
4.2.1. Google play
5. Characteristic
5.1. touch screen
5.1.1. about 70% of the entire phone surface