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In telecommunications, 4g is the fourth generation of mobile phone mobile communication technology standards. it is a successor of the third generation (3g) standards. a 4g system provides mobile ultra-broadband internet access, for example to laptops with usb wireless modems, to smartphones, and to other mobile devices. conceivable applications include amended mobile web access, ip telephony, gaming services, high-definition mobile tv, video conferencing, 3d television and cloud computing.