RecruitingBehavioural interventionUsing Mobile Health (mHealth) to Improve STI Treatment Adherence Among AdolescentsWe will conduct a randomized trial to compare differences in sexually transmitted infection (STI) treatment adherence between patients receiving text messages versus those receiving usual care (e.g. no text messages). We hypothesize that STI treatment adherence will be 20% higher among patients randomized to receipt of two-way text messaging services.