Transport for London (TfL) has confirmed that Oxford Circus, Stratford, Liverpool Street, Leicester Square and King's Cross will be among the first stations to be Wi-Fi enabled this summer.
By the end of July, approximately 80 stations will have Wi-Fi coverage in ticket halls, escalators and platforms, but not between stations. TfL said that 120 stations will have the facility by the end of the year.
The Wi-Fi service is being delivered by Virgin Media. A spokesman for the company said that the service would be funded from its capital expenditure budget and at no cost to London Underground.
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 taxpayers."