(The transmission speed of GSM mobile communication network is 9.6K/s. Now, there are more than 500 million GSM mobile users around the world, covering 1/12 of the people, and the share of GSM technology in the world's digital mobile phone field has exceeded 70?Because GSM is relatively imitated by mobile communication technology, it is the second generation mobile communication technology, so it is called 2G for short.)
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