Robert Downey Jr. has signed on to become the HTC One “Instigator of Change” as part of a two-year campaign with the company. HTC is spending about a billion dollars for marketing the new phone. Robert Downey Jr. replaces James Van Der Beek as the face for the phone. HTC has released a teaser for the new ads and the whole ad will be aired on Thursday. The ad features actors saying what they believe HTC stands for like “Humongous Tinfoil Catamaran.” The tag line for the campaign is called “Here’s To Change.” The ad was created by 171 Worldwide and you can follow the discussion of the ad with the hashtag #HTChange.