Orange and T-Mobile are to jointly pilot a 24-channel mobile phone TV service.
The six-month pilot will begin later this year and will be targeted at people living or working in west London.
Orange and T-Mobile customers taking part will use handsets with a technology called TDtv to receive up to 24 high-resolution TV channels and ten digital radio stations.
TDtv was first trialled in Bristol in 2006 and has been hailed as a more efficient way to deliver TV broadcasts by phone.
The mobile companies say they also expect the trial to prove there is customer demand for mobile broadcast TV and radio services.
Orange Product and Innovation Director Paul Jevons said: ‘The results from the technical trial of TDtv in Bristol last year were extremely encouraging, and this joint pilot of the service in London is an excellent opportunity for us to properly explore the great potential available to our customers from the technology.’
Orange Mobile TV already offers a broad range of content including the major terrestrial channels BBC, ITV, Channel 4 and Channel Five, as well as Sky and Setanta.
Which? mobile phone expert Jon Barrow said: ‘Services which allow you to watch TV on your mobile phone haven’t taken off yet at all.
‘There have been a number of problems – including reception difficulties – so it will be interesting to see whether this new technology addresses those issues.’