What should I do if the network fee for Unicom's two-year activities is changed from 600 to more than 800 after the second year?

Inquire about contracts and policies, and contact Unicom customer service.

1. Inquiring about contracts and policies: You need to carefully check the terms in the contract signed between yourself and Unicom, as well as relevant industry policies and regulations. If the conditions and methods of price adjustment are clearly stipulated in the contract, China Unicom needs to adjust the price according to the contract.

2. Contact Unicom customer service: If you are confused or dissatisfied with the price increase, you can contact Unicom customer service department and ask the other party the specific reasons and details of the price increase.