London underground passengers to be able to make phone calls from next year

Passengers on London's underground railway will soon be able to make and receive calls, filling an annoying communications gap for some but depriving others of one of the last bastions of mobile phone silence.A 4G signal will be available for the first time on the underground from next March, starting with the Jubilee line."The London Underground network is an incredibly challenging environment ... but we are now well on the path to delivering mobile connectivity within our stations and tunnels,