4G is the fourth generation of broadband cellular network technology, succeeding 3G. A 4G system must provide capabilities defined by ITU in IMT Advanced. http://iphone.saloon.jp/index.php?titss http://unchi.sakura.ne.jp/wiki/index.php?titss http://tokiminori.under.jp/miyagi_anison/index.php?titss Potential and current applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, and 3D television.