What is the message "No theme, download failed"?

1. Mobile phone receives SMS, network is unstable and data is lost.

2. Something in the background software of the system blocked the short message, resulting in incomplete reception.

Text message:

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 receive and send 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.

Packet loss:

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.

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.

SMS can be initiated by mobile communication terminals (mobile phones), SMS platform servers of mobile network operators, and network service providers (including ICP and ISP). ) interconnected with the SMS platform of mobile operators.

Although sending and receiving point-to-point messages through mobile terminals occupy the mainstream position in the technical means to realize the short message service function, fixed telephones, PHS and the Internet are becoming new tools and carriers.

At the beginning of the development of short message service, the sending and receiving of short messages started from mobile phones, and finally went to mobile phones, passing through GSM network /CDMA network, short message center and other network elements; With the emergence of short message on demand and customized services, mobile phones, internet sites and short message value-added service systems can send short messages to each other, and internet sites and short message value-added service systems have become new network elements.

GSM/CDMA network and SMS center still maintain the core position of SMS network; With the emergence of PHS mobile phone based on fixed telephone network in China, the short message service has been extended to fixed network, and the terminal is no longer limited to mobile phone.

PHS mobile phones or dedicated fixed terminals can be used as the sender and receiver of short messages, and the network foundation is no longer limited to digital mobile networks such as GSM/CDMA networks, but fixed networks can also be used as the network foundation of short messages, and the elements of short message networks have changed significantly.

With the extension of short messages from mobile phones to PHS and fixed terminals, and from digital mobile communication network to fixed telephone network, people's understanding of short messages is no longer just regarded as the "patent" of digital mobile phones, the business forms are changing, the network elements are changing, and the information content is also rich. There are only two things that remain unchanged in this process.

First, the message length of short message is always less than 160 English or numeric characters or 70 Chinese characters, which is closely related to the mechanism of short message transmission based on the signaling network of communication system. The second way is to send short messages-store and forward. When the user does not receive it, the short message will not be lost and will be temporarily stored in the short message center. When the user logs on to the network again, the short message will be quickly submitted to the user's mobile phone.