Answer / chipmaker

the main difference is that the dada rate
2G-126kbps
3G-upto100Mbps
4G-1Gbps

and other difference is
2G-fsk,tdma,fdma
3G-cdma
4G-ofdma,LTE,3GPP,mc-cdma

numerical aperture

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1,8,28,99,412

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