EE and Vodafone mobile broadband users will have continued access to the internet on the Tube post-2012 after the firms signed a wholesale agreement with Virgin Media.
Laptop and tablet users will be able to get online at stations across the London Underground - taking advantage of the Wi-Fi network installed by Virgin Media for the 2012 Olympic Games.
Millions of EE and Vodafone customers will be able to enjoy Wi-Fi access following the deal - with TfL travel information, news and London entertainment information available for free.
A variety of daily, weekly and monthly passes are being launched for consumers seeking full internet access - with pay-as-you-go tariffs starting at £2 per day.
Pippa Dunn, Chief Marketing Officer at EE, said it is "great" that EE, T-Mobile and Orange customers will soon get access to Underground Wi-Fi included in their plan.
"We know that our customers want the best and the fastest connections wherever they are - and with the largest 3G network and with 4G and fibre on EE, we already offer customers super-fast internet in the home, office and on the move," she stated.
"With Underground Wi-Fi now they can stay connected on the London Underground as well."
Srini Gopalan, Consumer Director at Vodafone UK, said his company is looking to "put the internet into people's hands wherever they are" and that certainly includes major transport links.
"We already spend £1.8 million a day on our UK network, giving our customers the depth and breadth of coverage that they expect whenever they need it," he stated.
"Now this deal will take us on a journey to the heart of the London Underground, ensuring our customers can stay connected even when they are beneath the streets of the capital."
At present, Wi-Fi access is available at 72 stations across the Tube network.
Virgin Media has announced plans to increase this number by 20 in December 2012, and by another 28 early next year.