Orange has launched the UK's largest ad-funded content trial with 800,000 of its 15.6m subscribers. Triallists selected from those that had previously downloaded music from the Orange Music Store are split into three groups: those offered tracks for free, those offered tracks at half price (49p) and those at full price (99p). All will be required to view advertisements as they download the tracks and prices are fixed such that there is no pricing advantage to the number of advertisements watched. 500 tracks will be made available for the three month trial. These will cover four different genres (pop, urban, rock and dance) and are from Warner Music Group's back catalogue. Mobile ad company ScreenTonic is managing and delivering the advertisements for the trial and has already signed Paramount Pictures and Ford up to the service. The trial is initially set to run with music, but the company intends to run similar trials with other mobile content such as games.