U.D.O. is known as an outfit which was founded by ex-member of well-known band called Accept Udo Dirkschneider. The band also comprised such musicians as guitarists Peter Szigeti and Mathias Dieth, bassist Frank Rittel and drummer Tomas Franke. As soon as the band got their music career started it caught the attention of the press and musical critics. Most popular U.D.O. ringtones listed: Blitz Of Lightning, Cry Soldier Cry, animal instinct, Azrael, Balls To The Wall (Piano Version), black heart.