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GSM (Global System for Mobile Communications)
GSM, or Global System for Mobile Communications, is a digital mobile telephony standard that has revolutionized wireless communications worldwide.
What is GSM?
GSM is a second-generation (2G) mobile communications standard developed by the European Telecommunications Standards Institute (ETSI). It uses time-division multiplexing (TDMA) technology to enable multiple users to share the same frequency.
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There are 4 products.
Reference: SIM800L
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