How to change the package for telecom mobile phones?

You can change it on your mobile phone now. But it seems that some packages still have to go to the local business hall. You can find manual customer service in the telecom client first, and some can be changed directly.

Then find the bag you want to change. There is an introduction in the link. Please submit it after selection, and someone will call to verify the registration in a few days. The message will be successful when it arrives.