The work follows a strategy similar to T-Mobile, which uses the tagline 'Get More'.
The T-Mobile brand officially replaces One 2 One tomorrow (Thursday).
Sources have said the O2 ads will have a 'magical' feel, and feature ordinary people surrounded by an abundance of bubbles.
O2 launched a teaser poster and five-second television campaign on Tuesday informing consumers of the brand's arrival.
The television executions consist of a swift ad-break opener showing isolated bubbles. The ad break then closes with the bubbles alongside the line, 'O2: the new current in mobile communications'.
Start-up agency Vallance Carruthers Coleman Priest has created O2's advertising.
Media was planned by PHD and bought by The Allmond Partnership.
BT Cellnet is currently the UK's third-biggest UK network with 11.1 million customers, behind Vodafone and Orange.