How do you know that the other party has seen the MMS? How do you know that the other party didn't read back?

In some social media or communication applications, some functions may be provided to show whether the other party has viewed or read the information you sent. Here are some common methods:

Reading labels: some applications (such as WhatsApp, WeChat, etc. ) After the other party has read your message, a read label will be displayed next to the message, usually a check mark or the other party's head. This means that the other party has seen your news.

Reading receipt: In some applications or communication protocols, you can request to send a reading receipt. When the other party opens your information, the system will automatically send you a receipt to inform the other party that you have read it. However, this function usually requires the consent or activation of the other party to take effect.

Message status: Some social media or communication applications will display the status of messages, such as "Sent", "Delivered" and "Read". These status messages can help you know whether the other party has received and read your message.

It should be noted that the availability and display mode of these functions may vary from application to application. Some applications may not provide clear read or read marks, or the other party may choose to turn off these functions. In addition, some applications may bypass the method of reading the tag, such as closing the reading receipt or previewing the information in the notification bar without actually opening it.