How can QQ send a password verification code to the mobile phone, and the SMS does not reply? What does this mean?

Due to the operator's network factors, the SMS may be delayed or lost in a short time, resulting in that the QQ Security Center cannot receive your SMS in time or send it to your mobile phone in time.

If you don't reply after sending SMS for many times, you can check whether the mobile phone has SMS interception software, whether the SMS is full, or whether the connection between the mobile phone card and the device is abnormal after plugging in the mobile phone card, and whether the mobile phone is in arrears. Please use other security means to verify or try again later.