What is GSM? According to the Video, what is GSM?
about 1 pg reference the video link Answer preview………… Global System for Mobile communication (GSM) is an open, digital cellular technology used for transmitting mobile voice and data services. Segan from video explains the difference between CMDA and GSM. GSM cell phones use removable Subscriber Identity Module, commonly known as SIM cards, to store their customer data. CDMA cell phones do not know SIM cards. They verify all their phones against the list on their network site. One can buy a used GSM mobile phone and just slide in their SIM card, but the same cannot be with a CDMA one. Unlike most CDMA devices, GSM cell phones can read data and voice at the same time. GSM makes it possible for an individual to be reached via the same mobile number in more than two hundred countries……..
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