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Analog voice, not able to transmit data, 2.4 kbps, developed in Tokyo, Japan
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Digital voice, can send text or SMS, can use the internet, 0.1 Mbps, developed in Finland
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High speed wireless connection, can call, can video call, can play games, 3Mbps, developed in Japan
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Upgraded video quality and various games to be full HD, streaming more smooth, 12.5Mbps, developed in Norway
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Able to connect to internet, unlimited data capacity, low latency, HD multimedia streaming, 50Mbps - over 1 Gbps, developed in South Korea