手机 Cell Phone

手机 Cell Phone

cell phone safety

cell phone virus

Cell Phone Generations

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)

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