Through what does the mobile phone spread information?

The mobile phone signal of the call is transmitted to the nearest base station, that is, the mobile or connected signal tower, and then the high-frequency signal is down-converted by the base station, and the base stations communicate with each other.

This kind of signal travels in a straight line, and it will be blocked when it meets tall buildings, so those towers are erected very high and transmitted to the base station near the mobile phone that answers the phone, and then converted into high-frequency signals and sent to the mobile phone.

The frequency of mobile phone signal is very high, generally around 900Mhz, and it propagates through ionospheric reflection. At the same time, mobile phone information is also transmitted by electromagnetic waves (or radio waves).

Extended data:

Features of mobile communication:

1. Mobile phone is a kind of wireless communication equipment. With the continuous development of science and technology, mobile phones are getting smaller and smaller, with more and more functions. Mobile MMS service does not need complicated procedures and long waiting. Users can enjoy this service by pressing a few keys and making some simple settings.

2. Unlike making phone calls and surfing the Internet, mobile multimedia messages must require the receiver to be at the other end at the same time. Information can be stored in the server of MMS platform. Once the other party is turned on, the message will be sent automatically, and the party who receives the message can reply in real time or delay the reply. The information is stored in the mobile phone for easy reference at any time.

3. Mobile newspaper adopts wireless multimedia communication technology, which is different from WAP browsing and can receive all the contents of the newspaper instantly without online. While the newspapers subscribed by traditional subscribers are still in printing houses and post offices, mobile newspapers have been displayed on mobile phones.

4. From the perspective of communication, short messages are more convenient and faster, which actually brings about the increase of communication frequency and the expansion of communication content. This feature of SMS and MMS makes them have incomparable advantages in news information dissemination.

References:

Baidu encyclopedia-mobile communication