Why can't the mobile phone receive the verification message of "Tenpay installs digital certificate"?

Tenpay needs to bind the mobile phone number to the account before installing the digital certificate, so it will prompt you to receive the verification code binding the mobile phone number to complete the installation. If you don't receive the text message, first determine whether your own mobile phone number is a bound mobile phone number. If you don't receive the verification code, you can click the voice prompted above to get the verification code, and dial 0755860 13860 with the bound mobile phone number to get it. If you are not prompted to get it successfully, press 6.