What is the reason why the mobile phone shows a full signal but the network speed is very slow?

In fact, when we surf the Internet, we have a concept of signal strength. Signal strength refers to the signal strength of the mobile phone network, and the signal strength on the mobile phone is only the sum of the communication strength of the call and the Internet strength. Maybe the telephone strength is high, but the network strength is not high, and there will be a situation where the signal is full but the Internet is slow.

The more cells displayed in the cell phone signal bar, the closer you are to the operator's base station, but this does not mean that your network signal is good, because the ratio of cell phone signal strength to the number of cells in the cell phone signal bar is determined by the cell phone manufacturer. Therefore, sometimes we will see this phenomenon, the same location, the same operator's mobile phone card, some mobile phone signals are all Gidar, and some mobile phone signals are only 4 grids. Moreover, most mobile phone manufacturers will also calculate other factors affecting communication into the signal grid.

Signal strength is generally expressed as a negative number, and the larger the value, the better the signal. Generally speaking: the signal strength is between -50 DBM and 0 DBM, which means that your mobile phone signal is excellent; If the signal strength is between -90 DBM and -60 DBM, then your mobile phone signal is normal; The signal strength is less than-1 15 DBM, so your mobile phone can neither make calls nor surf the Internet. And even if the signal displayed on your mobile phone is good, it doesn't mean that your network speed will be faster.

When we surf the Internet slowly, we can try to turn on the signal devices in the mobile phone tools in turn, and we can intuitively see whether the quality of mobile Internet access is good or slow from the signal devices. Let's take Android as an example and click "Settings-About Mobile Phone-Status Information -SIM Card Status". In the state of SIM card, we can see the specific parameters of signal strength. Because many external factors will affect your data network, the more grids displayed in the cell phone signal bar does not mean that your network speed is faster.