How do I know the message is blocked?

According to the experience of querying Baidu, we know how to block short messages:

Turn on your mobile phone, click SMS, click the ":"icon in the upper right corner, click Settings in the pop-up options, click Advanced Settings, click Get Delivery Report after sending SMS, and open the switch button on the right. At this time, the message will be displayed after it is successfully sent, and it will not be displayed if it is blocked, so you can judge whether the other party has blocked your message.

Short message, short for SMS, refers to text or digital information sent or received directly by users through mobile phones or other telecommunication terminals. The number of characters that users can send and receive SMS at a time is 160 English or numeric characters or 70 Chinese characters.