Can you know 1G to 4G technology
1G voice signals only , 2G voice & data signals , digital fidelity cellular phones ,GSM ,CSMA ,TDMA , 3G voice, data & video signals , Video telephony / internet surfing , 3G W-CSMA , UMTS 4G Enhanced 3G interoperability protocol , high speed & IP-based , 4G mobile IP.
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