Why didn't iMessage respond?

Is it because there is an option called in the iMessage settings of the other party? The switch to send the read receipt is not turned on. He doesn't want you to know that he read the message you sent.

Just because there is "sent" information on Apple's mobile phone doesn't mean it has been read. "Sent" means that the message was sent successfully and has been sent to the other party's mobile phone. Only when "read" is displayed, it means that the other party has read the short message.

"Sent" and "Read" will only be displayed when both parties send messages with images.

IMessage is an instant messaging software launched by Apple, which can send short messages, videos and so on. It has high security. Different from the SMS/MMS service of operators, users only need the data support of WiFi or cellular data network to complete communication.

With iMessage, you can send and receive messages with any Mac user who uses iPad, iPhone, iPod touch or Mountain Lion, as well as send photos, videos, location information and contact information.

If you have more than one Apple device, iMessage can keep an uninterrupted conversation on all devices.

In addition, you can send text messages, photos and videos to other mobile phones through the cellular network. You can even ask Siri to text you. Just say "Tell Xiaoli I'm on my way" and Siri will help you write and send messages.