To prevent unauthorized access if your password is stolen. Even with your password, a hacker cannot log in without also having your registered phone or active device.
对于您的问题深感抱歉，非常感谢您的举报反馈，小编一定会及时处理该问题，同时希望能尽可能的填写全面，方便小编检查具体的问题所在，及时处理，再次感谢！
