If it is blocked, where can I unblock the SMS message?

As you mentioned, you can unblock text messages in the following ways.

1. Mobile APP interception. Blocking can be canceled in the mobile APP settings.

2. Operator interception. For example, if you have already blocked China Unicom's online services at the China Unicom business hall (or through other methods or channels), you can contact China Unicom customer service in the place where the number belongs for help.

3. Due to differences in the business rules of each operator and each identity, if you are unable to unblock text messages by yourself, you can contact the customer service of the number owner for help.