Apple has been subpoenaed by the United Stated Federal Trade Commission as part of an antitrust investigation of Google, Bloomberg reported on Tuesday. The FTC is reportedly interested in an agreement with Apple that made Google the default search engine on Apple’s iPhone, iPad and iPod touch devices. “As mobile search gets more widespread, the default setting becomes more significant,” antitrust lawyer Allen Grunes told Bloomberg. The FTC has been looking into Google’s business practices — specifically, its search business — for almost a year.