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GSM

 
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Dan Carpenter
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PostPosted: Sat Sep 27, 2008 5:09 am    Post subject: GSM Reply with quote

GLOBAL SYSTEM for MOBILE COMMUNICATIONS

The foremost international standard for digital cellphones used widely in Europe and Asia for years.
GSM is one of two major mobile phone technologies in the U.S. The other is CDMA. Cingular and T-Mobile use GSM. Sprint and Verizon use CDMA.

The most visible feature of GSM are SIM cards. SIM cards are removable, thumbnail-sized smart cards which identify the user on the network, and can also store information such as phone book entries. SIM cards allows users to switch phones by simply moving their SIM card from one phone to the other.
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