GSM stands for Global System for Mobile Communications, a standard for mobile communication networks. GSM is a digital cellular network technology used for voice and data communication. It was first introduced in 1991 and is now widely used in over 200 countries. GSM uses a SIM card to identify and authenticate users on the network. It operates on different frequency bands depending on the region. GSM has been largely replaced by newer technologies like 3G and 4G. Examples of GSM-based networks include AT&T and T-Mobile in the US, and Vodafone and O2 in the UK.

Cognizant Interview Questions: what is gsm?

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what is gsm?

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GSM stands for Global System for Mobile Communications, a standard for mobile communication networks.

GSM is a digital cellular network technology used for voice and data communication.
It was first int...read more

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