What does signal e mean?

The "e" on the signal status bar stands for EDGE network and refers to 2.75G network. At this time, the network speed is often very slow or can't get on.

EDGE is a transitional technology between the second generation mobile network and the third generation mobile network, so some people call it the "second generation and a half" technology.

Signal introduction:

A signal is a physical quantity representing information. For example, electrical signals can represent different information through changes in amplitude, frequency and phase. This kind of electric signal can be divided into analog signal and digital signal. Signals are tools and carriers of information.

Broadly speaking, it includes optical signals, acoustic signals and electrical signals. According to practical use, signals include TV signals, broadcast signals, radar signals, communication signals and so on. According to the time characteristics, there are deterministic signals and stochastic signals.

Signals are tools and carriers of information. Broadly speaking, it includes optical signals, acoustic signals and electrical signals. For example, the ancients used the rolling wolf smoke generated by lighting beacon towers to convey the news of enemy invasion to distant troops, which belongs to optical signals; When we speak, sound waves will reach other people's ears, so that others can understand our intentions. This is a sound signal.

All kinds of radio waves propagating in space and currents extending in all directions in the telephone network can be used to express all kinds of messages to the distance, which belong to electrical signals. Only by receiving light, sound and electrical signals can people know what the other party wants to express.