1. Possible network delay. You can wait a few minutes before receiving or reapplying for the verification code. 2. It may be caused by the arrears of mobile phones, so users are advised to pay the arrears in time. 3. It may be that the mobile phone has turned on the SMS blocking function, which can be removed in the SMS settings. Mobile phone operation skills: 1. Text messages can be sent in groups. Open the "Information" application of the mobile phone, click the "Write SMS" button, click the "+"option next to the recipient, and check the person who needs to send SMS for group sending operation. 2. Some mobile phones have short message filtering function, which can filter advertising short messages after being turned on. 3. If the backup function is turned on, you can delete the message.