The mobile phone has been operated by the ticket changer at the jewelry show. You can contact the organizer of the jewelry exhibition or seek legal assistance.

1. Contact the organizer of the jewelry exhibition: You can contact the organizer of the jewelry exhibition, report the situation to them and ask them to investigate the ticket changer.

2. Seek legal aid: If the mobile phone is operated by the ticket changer, causing serious consequences, such as property loss and personal information disclosure, you can seek legal aid through legal channels to safeguard your rights and interests.