1. communicate with the relevant departments or principals of the school: contact the relevant departments or principals of the school, explain your situation to them, and ask them to cancel this requirement.

2. Ask for help: You can ask for help from student organizations, student unions and other relevant departments, express your thoughts and needs to them, and ask them to help you solve the problem.

3. Contact Unicom customer service: You can contact Unicom customer service, explain your situation to them and ask them to cancel the request.

Please note that if the school clearly stipulates that Unicom mobile phone cards must be handled, it needs to be handled in accordance with the school regulations. However, if the school does not clearly stipulate or you can provide relevant legal basis to prove that the requirement is illegal, you can safeguard your rights and interests through legal channels.