The difference between short message sending and reading.

The difference between them is the difference in definition and characteristics.

1, different definitions: SMS has been sent, indicating that the information has been successfully sent to the receiver's mobile phone, and the information has reached the target device, which is recorded as successful by the mobile phone or service provider. The message has been read, which means that the receiver not only received the message, but also opened and checked its contents.

2. Different features: the sending of the short message only proves that the transmission process of the short message has been completed, and does not guarantee that the receiver has checked or noticed the short message. Reading SMS provides further interactive feedback to ensure that the information has been actually read by the target users.