Virgin Media will have its Underground Wi-Fi system up and running in around 80 Tube stations ahead of the Olympic Games.
According to the broadband provider, customers will be able to access the service for free in a number of stations including Oxford Circus, Stratford and King's Cross this summer.
Other stations expected to be connected by the end of July include Canary Wharf, Liverpool Street, Covent Garden, Marble Arch and Old Street.
Gareth Powell, London Underground's Director of Strategy and Service Development, said: "Bringing a next generation Wi-Fi service to one of the world's oldest underground transport networks is progressing as planned and the forthcoming service is testing well.
"The first stations include some of our busiest and most well-known destinations and we're on-track for a successful launch this summer – all delivered at no additional cost to fare payers or tax payers."
The Wi-Fi access will mean that travellers can access Transport for London's up-to-the-minute service information pages as well as the journey planner and news and entertainment content while on their commute.