There is no theme reason for SMS display.

The reasons why there is no theme in SMS display are: 1. When the mobile phone receives SMS, the network is unstable and data is lost. 2. Something in the background software of the system blocked the short message, resulting in incomplete reception. Short message service (SMS) is a part of unified communication service plan. Users can directly send or receive text or digital information through mobile phones or other telecommunication terminals. The number of characters that users can send and receive short messages at a time is 160 English, numeric characters or 70 Chinese characters. Short message is a telecommunication service in digital mobile communication system. It is a non-real-time and non-voice data communication service to transmit text or digital short messages through the signaling channel and signaling network of mobile communication system. Data is transmitted in packets on the Internet, and each packet is nK, no more, no less. The transmission of data packets can't be completed completely, because there will always be some losses caused by worms, too long network cable connection distance, network cable failure, operating system failure, network card failure and so on. In this case, the internet will automatically let the computers of both parties make up the package according to the agreement. If the line is not good (such as using a cat), the data loss will be very large, and it is impossible to complete the package repair work 100%. In this case, data transmission will be vulnerable, resulting in packet loss.