How does YY unbind the mobile phone?

YY can't unbind the mobile phone, only change the mobile phone number, as shown below.

1. First, open YY, click the Personal Center in the lower right corner, and then click Set Small Label.

2. On the Settings page, click and enter the account and security options.

3. On the Account and Security page, click and enter phone binding options.

4. On the page of modifying mobile phone number, click the modification option below.

5. Enter the verification code and click Next.

6. After entering the new mobile phone number, click Next.

7. Enter the verification code received by the new mobile phone number, and then click Next to operate successfully.

8. Complete the renderings.