Cingular Wireless said that cable channel HBO has produced a special mobile mini-series based on the popular show “Entourage” that extends the story beyond what is shown on television. Cingular, and its rivals Verizon Wireless and Sprint Nextel, are all aiming to boost revenue with services such as video and music. Cingular said its mini “Entourage” series, with episodes that last 4 minutes each, will follow one story line based on “Entourage” character Johnny Drama and not distract from the regular series. The wireless company said it would also show full-length episodes from the first season of “Entourage” and from other popular shows such as “Sex and The City” and “Curb your Enthusiasm.”