What about the text message sent to a person and the text message replied after receiving it?

Server problem. Sending and receiving short messages at the same number are not together, which is a server problem affected by the network. There are two kinds of short messages: one is text or digital information sent or received directly by users through mobile phones or other telecommunication terminals, and the number of characters that users can receive and send short messages at a time is 160 English or digital characters or 70 Chinese characters; One is MMS. Its biggest feature is that it supports multimedia functions and can transmit comprehensive content and information, including text, images, sounds, data and other multimedia formats.