The method for modifying cornet by China Mobile app is as follows:
Method 1: the mobile phone sends a text message "QXDH" to 10086, and the mobile company will send me a text message to confirm. Then follow the prompts.
Method 2: Dial 10086 for manual service, and then choose to cancel or modify cornet according to the prompt.
Method 3: I go to the mobile service desk to cancel or modify the cornet service.