How does China Unicom cancel the number by SMS?

At present, it is impossible to cancel the number through Unicom SMS. It is recommended that you cancel your account through the mobile phone business hall: you can operate through the Unicom mobile phone business hall APP- Services-Handling-Account Cancellation, and follow the prompts. If there are outstanding expenses, you need to deposit some expenses in advance; If there are extra charges in the card, you can provide a bank card number or a mobile phone number of Unicom in the province or a Wo account, and directly transfer the extra balance to you.