____ was the first-generation cellular telephone system. a. Advanced Mobile Phone Service (AMPS) b. Global System for Mobile (GSM) Communications c. Time Division Multiple Access (TDMA) d. Personal Communications Services (PCS)

GSM is a cellular network system of the second generation, which is currently used in the world's. It is most useful in a telecommunications network. It is also regarded as open-ended and wireless cellular technology for mobile voice and data transmission, and certain choices were incorrect, which is explained as follows:

In option a, It is wrong because it is part of the first generation.
In option c, It works on channels, that's why it is wrong.
In option d, It is part of wireless communication, that's why it is wrong.

____ was the first-generation cellular telephone system.​ a. ​Advanced Mobile Phone Service (AMPS) b. ​Global System for Mobile (GSM) Communications c. ​Time Division Multiple Access (TDMA) d. ​Personal Communications Services (PCS)

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____ was the first-generation cellular telephone system. a. Advanced Mobile Phone Service (AMPS) b. Global System for Mobile (GSM) Communications c. Time Division Multiple Access (TDMA) d. Personal Communications Services (PCS)