Using mobile voice over IP applications in the tube used to be impossible. Now you can do it daily for free, at least until 2013.

Branson-backed Virgin Media had originally planned to end its free Wi-Fi in the tube offer after the summer games had come to an end and make the service an exclusive one to its broadband subscribers. However, the company has reversed that decision due in part to — as reported by The Telegraph — wholesale talks with other ISPs in the area as they sought to offer the service as part of their own packages.

This comes as good news to those who want to be able to keep in touch with friends and family through the Truphone app while making their daily tube commute. After all, the service makes it possible to have phone service even in the Underground of London. What could be better?

The full press release follows:

Tube WiFi smashes one million connections in 24 hours

WiFi on London Underground to remain free for everyone in 2012

Following a landmark day which saw Virgin Media’s WiFi service deliver over one million tweets, Facebook posts, emails and web pages in its busiest 24 hours yet1, Virgin Media today announced that WiFi on London Underground will remain free for everyone throughout 2012.

Over 661,000 people are now online underground, with Waterloo, Victoria, King’s Cross, and Oxford Circus some of the busiest connected Tube stations. WiFi from Virgin Media is already available in 72 London Underground stations, from the ticket halls to the platforms, with more stations due to be brought online in 2012.

Jon James, executive director of broadband at Virgin Media, said: “WiFi on London Underground has been an incredible success with hundreds of thousands of people kept up-to-date and entertained whilst travelling around our capital city. Commuters and visitors will be able to make use of the internet throughout 2012 and we’re in positive talks with potential wholesale partners to ensure a fantastic experience for all Tube passengers throughout 2012 and beyond.”

Gareth Powell, London Underground’s Director of Strategy and Service Development, said: “WiFi at Tube stations is proving to be a very popular service with up-to-the-minute travel information and journey planner at passengers’ fingertips. There are already 72 London Underground stations online and our engineers are working in partnership with Virgin Media to continue the roll-out in 2012.”

The comprehensive WiFi portal with TfL travel information, updates and London news and entertainment will remain free for all Tube passengers throughout 2012 and beyond. From next year, Virgin Media’s broadband and mobile subscribers will continue to have full online access and Virgin Media is engaged with potential wholesale partners to provide the service to their own customers on an ongoing basis.