1. Apple's mobile phone signal shows that lte indicates that the operator's network is available, and the mobile phone can be used for network connection to the Internet. In fact, this is the meaning of 4G network. The full name of LTE is LongTermEvolution, which is a high-speed wireless communication standard applied to mobile phones and data card terminals.

2.4G communication technology is the fourth generation mobile information system, which is a better improvement of 3G technology. Compared with 3G communication technology, 4G communication technology has greater advantages. It combines WLAN technology and 3G communication technology well, which makes the image transmission speed faster, and the transmitted image quality and image look clearer. The application of 4G communication technology in intelligent communication equipment makes users surf the Internet faster, with the speed as high as 100Mbps.

3.4G communication technology is based on 3G communication technology and is constantly optimized and upgraded. It is an innovative development, which combines the advantages of 3G communication technology and derives a series of inherent characteristics, focusing on WLAN technology. The innovation of 4G communication technology makes it more competitive than 3G communication technology. First of all, 4G communication can realize the transmission of original pictures and videos, and the transmission quality of original videos is comparable to that of computers. Secondly, the download speed of software, files, pictures, audio and video can reach tens of megabytes per second, which 3G communication technology can't do, and it is also a significant advantage of 4G communication technology. This fast download mode can bring us a better communication experience.