http://blog.demkov.me/352-%D0%BA%D0%B0%D0%BA-%D1%83%D1%81%D0%B8%D0%BB%D0%B8%D1%82%D1%8C-3g-%D0%B4%D0%BE%D0%BC%D0%B0/ http://netobzor.org/forum/index.php?topic=2888.0