The prime minister is to participate in the first ever SMS Question Time with the public on 25 November.
In an event organised by mobile phone company O2, anyone with a mobile phone can text questions to Tony Blair and then send it to 80202.
Capital Radio's Margherita Taylor will then select 30-35 questions and the prime minister will answer them live in a chat room on O2's website.
"There are 54 million handsets across the UK so almost everyone can participate. The prime minister's office has been very keen on the idea," said Hugh Griffiths, head of data products and services at O2.
"The format has been used by pop stars and celebrities, so why not politicians? It's also a good way to get younger people involved in the political process by using the power of the mobile and the power of chat."
The session will be transmitted live from 10 Downing Street via a web cam. Those people who sent the chosen questions will receive a personal reply from the prime minister.
Details of how to set up you phone to view the session can be found on O2's websitehere.
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