The UK's big four mobile phone operators are set to stump up £150m to install mobile and Wi-Fi coverage on the London Underground railway network.
Mayor Boris Johnson has backed the deal between Transport for London and the firms and reports suggest said it could be signed off in the next two weeks.
An unnamed source via trade magazine said: "We are very close to signing a deal to put mobile on the underground. The Mayor of London is keen for it [the network] to happen before the Olympics."
Commuters at Charring Cross Underground station are already logging onto the internet in a six month trial with BT.
A TfL spokeswoman confirmed they were in discussions with cellular operators.
Many have questioned the need for Wi-Fi and mobile phone coverage on the underground network given the costs and other budget priorities. But last month the Mayor invited proposals from telecommunications firms to install coverage on a stretch of the Jubilee Line for the Olympics in 2012.
Last year, TfL scrapped a six-month trial that would have seen mobile signals available on the Waterloo & City line due to high costs. This current trial is being funded through BT at no cost to fare or taxpayers.
Speaking at the time, TfL said a previous initiative by operators were not "commercially credible".
"While it is technically possible to deploy mobile-phone and data-wireless solutions on the deep-level Underground tunnels and stations, the unique nature and environment of the Tube mean that project costs would be prohibitively high at this time".
The plan is reported to involve conventional leaky feeder cables running down into the station platforms to deliver the radio signal along with signal repeaters.