题目是手机的作用，当然是英语了。一二百字就好，万分感谢

将www.shouji.net网上的部分关于手机的英文词汇照搬过来,你要的词汇都在里面,你怎么写都行!
仅供参考.

What is Cell Phone?
A cell phone is a device that behaves like normal telephone but able to move over a wide area.
The major different between a cell phone and cordless phone is a cordless phone act as a telephone only within a limited range of area, while a cell phone can move over a broader area.
By using cell phone, people can connect to the telephone network by dialing directly to the other party's number on an inbuilt keypad.

Cell phone feature　
Besides behave like a normal form and work on cellular networks, cell phone also offer other features:
SIM card
SMS, MMS, WAP, Internet services
Built-in digital camera, video recorder
Radio, MP3, voice recorder
Wireless/wire connectivity: Bluetooth, Wifi, USB
Mobile power: battery, car lighter, solar energy
Clock, calculator, office tools, games
Customize ring tone, vibrating alert, or combination of both

Cell Phone Generation
The technology of cell phone is increase rapidly everyday.
The history of cell phone can be traced back to devices which unrecognized in today's GSM (Global System for Mobile Communications).

· Early Years
· First Generation (1G)
· Second Generation (2G)
· Third Generation (3G)
· Forth Generation (4G)

Future Prospects of Cell Phone(需要看,可以到网上查看).




参考文献：www.shouji.net