Sony Ericsson will be the only advertiser to appear in ad breaks throughout the launch day.
This is part of a four week six-figure campaign by Sony Ericsson on the station.
However, its ads will not take up the full duration of ad breaks, leaving extra time for music and editorial promotion of the new brand.
Sponsors of regular shows will still have their ads played throughout the day, but they will not appear in ad breaks.
Nick Hewat, Absolute sales director, said: "Sony Ericsson was looking to find ways of linking its new mobile phone model to quality music and brand clarity - which fits really well with our new brand.
"The deal is three weeks long and trails for Sony's ads will begin next week.
"Effectively, it has bought out the other advertisers on that day only and we have organised this with all our other clients."