One of two ways. First, and hardest, get a job at Bungie and they'll give you a downlaod code for it. Second, and most expensive, buy an iPhone, get the contract, download "Bungie Mobile", select "Love, Bungie", click blue flanes, and switch to "on".
Or just wait for bungie day when they give it away for everyone forver for free. Making it like recon armor, everyones all, "zomg iz l337" then they take a cold hard look at themselves and realize,"god im pathetic for thinking this was cool" im fine with my standard flames thank you very much!