http://www.htc.com/us/go/htc-advantage-giveaway-rules/
During the Promotion Period, log-in to or create your Twitter account. (Creating a Twitter account is free but subject to the Terms of Service at https://twitter.com/tos.) Follow @HTCUSA on Twitter and tweet the hashtag “#HTCAdvantage” along with a relevant response (herein, your “Submission”) to the Sponsor’s tweeted Sweepstakes question or prompt. You will automatically receive one (1) entry into the Sweepstakes drawing.
Prizes: TWO HUNDRED (200) GRAND PRIZES: A HTC One mobile phone. Approximate Retail Value (“ARV”): $599.99.