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Global System for Mobile communication (GSM) is a digital mobile telephony system which is widely used in Europe and other parts of the world. GSM uses a variation of Time Division Multiple Access (TDMA) to digitize and compress data, then send it. GSM operates at a frequency band of 850, 900, 1800 or 1900 MHz depending on the country/region.

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Last update:
‎06-03-2021 09:38 AM
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