As of late January, it became illegal in the United States to unlock newly purchased mobile phones without carrier authorization. The decision, which came from the Librarian of Congress declining to issue an exemption for such activity under the Digital Millennium Copyright Act, serves to restrict U.S. customers from shifting service to other carriers or using their devices abroad with local SIM cards. A "We the People" petition addressing the issue was quickly started, with the petition exceeding the 100,000 signatures required to receive a response from the White House.