Why can't China Unicom receive the verification code?

The possible reasons why the operator's mobile phone number cannot receive the verification code are as follows:

1. There may be some input errors when filling in the mobile phone number of China Unicom. Please make sure that the entered mobile phone number of China Unicom is accurate.

2. If the mobile phone number of China Unicom is down or in arrears, it will lead to failure to receive the verification code. Please confirm whether the status of China Unicom's mobile phone number is normal and whether there are any unpaid charges.

3. The spam filtering or blacklist function may be turned on in the SMS settings of the mobile phone, resulting in the normal verification code SMS being misjudged as spam and intercepted. Please check the SMS settings of your mobile phone to ensure that SMS with verification code is not blocked.

4. Sometimes the verification code message may be delayed due to network delay or other reasons, and it will take some time to receive it. Please wait patiently for a while. If you haven't received the verification code for a long time, please try to request it again.