If you want to cancel the Unicom card (China Unicom SIM card), you can log in to China Unicom official website or the mobile phone business hall APP, find the function of canceling the account/card, provide the required information such as mobile phone number and ID card on the corresponding page, and complete the cancellation operation according to the prompts.
In addition, you can also call China Unicom's customer service phone number 100 10, and choose the corresponding service options (such as account management and cancellation) according to the voice prompts, communicate with the customer service staff about the cancellation, and provide the authentication information required for the cancellation operation.
Description of canceling mobile phone number
1. Number status: Before logging out, make sure that your mobile phone number is in normal availability. If your number is down, in arrears or has other problems, you may need to solve these problems before you can cancel it.
2. Balance handling: If your mobile phone number still has a balance, please make sure to use or transfer the balance in advance. Usually, once the mobile phone number is cancelled, the balance cannot be recovered.
3. Unbind account: If your mobile phone number is bound to other accounts (such as social media, email, online banking, etc.). ), be sure to unbind these accounts or change the contact information in advance, so as not to be unable to perform related operations after logout.