There is a "frequency band" setting in the network settings in the mobile phone. How to set it?

If it is not set manually, its signal will be stronger. This is the default setting of the mobile phone. Selecting different frequency bands will correspond to different networks (2G, 3G, 4G). The mobile phone will automatically select the most suitable network to use according to the surrounding network signals.

When using a mobile phone, the default "frequency band" setting of the mobile phone will make the mobile phone automatically acquire the surrounding network signals. If the mobile phone supports 2G, 3G and 4G networks at the same time, when the 2G network is strong, the 2G network will be automatically selected. When the 3G network is strong, it will automatically choose the 3G network; When the 4G network is strong, the 4G network is automatically selected, which is the default setting of the mobile phone.

Extended data:

Now China's mobile phone network is divided into 2G network, 3G network and 4G network, and the related frequency bands are:

1, 2G network: Unicom 2G/ mobile 2G(GSM), telecom CDMA 1X? .

Frequency band:

GSM 850/900/ 1800/ 1900，

CDMA 1X:800MHZ

2.3G networks: China Unicom 3G(WCDMA), China Telecom 3G(CDMA2000) and China Mobile 3G(TD-SCDMA).

Frequency band:

3G:CDMA EVDO 800/ 1700/ 1900/2 100

3G:WCDMA 900/2 100

3G:TD-SCDMA 1880- 1920

3.4G networks: mobile TD-LTE, Unicom TD-LTE, telecom TD-LTE, FDD-LTE.

Frequency band:

4G:FDD-LTE b 1/2/3/4/5/7/8/ 13/ 17/ 18/ 19/20/25/26/28/29

Take the 4G standard LTE as an example. There are many frequency bands in LTE, and there are 22 frequency bands in LTE FDD***, marked as 1~22.

LTE TDD*** has nine frequency bands numbered 33~4 1. At present, LTE is divided into four frequency bands: A band, D band, E band and F band.

The frequency ranges are 20 10 MHz~2025 MHz, 2570 MHz~2620 MHz and 2320mhz ~ 2370mhz (2300mhz ~ 2400mhz), 1880 MHz ~ 1920 MHz respectively, corresponding to international standards 34 and 38.

References:

Baidu encyclopedia-frequency band