Sprint has introduced an advertising campaign to launch the HTC EVO 4G LTE smartphone. The theme of the campaign, which began airing from 3 June, is 'Unlimited Love Unlimited EVO.' Unlimited Love Unlimited EVO is a fully integrated campaign created by Sprint in collaboration with 'Team Sprint' – integrated brand agency Digitas and ad agency Leo Burnett – designed to demonstrate the combination of the EVO smartphone on Sprint's LTE network. The campaign will be featured across TV, online, digital out of home, mobile and print, along with sweepstakes on Facebook. The national TV spot, 'EVO Live,' is a love song sung by EVO fans with their phones. The spot is a 130-person 'mobile chorus' and the ad highlights HTC EVO 4G LTE's features, including its camera technology, audio and voice quality enhancements, and the red-line design detail and kickstand on the back of the phone. Sprint introduces the 'Win What You Love' sweepstakes, an socially interactive campaign on Facebook. In addition to the 'Win What You Love' grand prize, 40 additional lucky EVO users will get the HTC EVO 4G LTE devices as runner-up winners in the sweepstakes. Sprint is also giving fans the opportunity to have their tweets featured on a digital billboard in New York's Times Square. The Times Square interactive billboard launches in early June.