What is the reason why the email verification code failed to be sent?

The network is busy and the mobile phone is in arrears.

1, the network is busy. When sending the verification code, the network is busy or there is something wrong with the network settings, which leads to the failure of sending the verification code. You can close the network, find a place with a better network, restart the network and send it again.

2, mobile phone arrears. If the mobile phone is in arrears when sending the verification code, it will not receive the verification code. In this case, you need to pay first and then choose to send.