How to protect my QQ from being applied for refund?

Call again and bind your mobile phone number immediately, because when you bind your mobile phone, you will receive SMS reminder when you change your password or security. If you don't do it yourself, you can reply to the SMS to cancel the password and security change, just set it in aq.qq.com.

The method for bin that mobile phone comprises the follow steps:

1. Open QQ and click System Settings below.

2. After setting, click "Security Settings"-Apply for password protection.

3. After entering the security center, click "Replace".

4. Click "Replace confidential mobile phone".

5. Enter a new mobile phone number to complete the binding.