Free access to the web for anyone subscribed to the networks while travelling on the tube.
Virgin Media announced its London Underground wi-fi initiative back in March, proposing citywide access to free web services for the Olympics during the summer, but just last month announced the freebie would be available to commuters until the end of 2012.
Now, the firm has enlisted EE and Vodafone as wholesale partners, which will provide subscribers of the networks with exclusive access to the web for free from next year onwards.
Jon James, executive director of broadband at Virgin Media, said: "Wi-fi on London Underground has been an incredible success with over 700,000 people already online and a remarkable million sessions every day.
"We’re rolling out the service to reach even more stations throughout London, from Camden Town to Clapham Common and, thanks to our partnership with EE and Vodafone, the majority of tube users can stay connected for no extra cost."
Gareth Powell, Director of Strategy and Service Development for London Underground, said: "Wi-fi is a great way to keep our customers up-to-date with live travel information and other news and entertainment. We are delighted that Virgin Media is giving the majority of Londoners the chance to continue to enjoy wi-fi at no extra cost next year and beyond."
Meanwhile, those not subscribed to the aforementioned networks will have the option to use a PAYG service, with daily, weekly, and monthly passes on offer for £2 upwards.