What does it mean that the signal position on the mobile phone sometimes shows a "G"?

G, e, h, etc. Next to the cell phone signal is the cell phone signal sign:

G: stands for GSM network or GPGS network, corresponding to 2G network or 2.5G network respectively (shown as circle O on iPhone). The internet speed is slow, and the internet speed is generally 3~ 10K, which saves traffic very much and has gradually begun to be eliminated.

GPRS (General Packet Radio Service) is the abbreviation of general packet radio service technology, which is a mobile data service that GSM mobile phone users can use and belongs to the data transmission technology in the second generation mobile communication. GPRS is the continuation of GSM.

GPRS is different from the way of continuous channel transmission in the past, and it is transmitted in the form of packets, so the cost borne by users is calculated based on the transmitted data, rather than using the whole channel, which is cheaper in theory. The transmission rate of GPRS can be increased to 56 or even 1 14Kbps.

Extended data:

E, stands for EDGE network, and refers to 2.75G network, with a network speed of about 40K, which is slightly faster than GPRS.

3G refers to an ordinary 3G network. There are three 3G networks in China, namely China Unicom WCDMA, China Telecom CDMA2000 and China Mobile TD-SCDMA. The speed is fast, the downlink speed can reach 2Mb, and the internet speed is generally around 100K;

H refers to the HSDPA network after 3G upgrade, which is a 3.5G network with fast downlink speed,14.4 MB; ;

H+, an upgraded version of HSDPA HSPA+, is a 3.75G network with a downlink speed of 42Mb and an Internet access speed of about 250k;

LTE stands for LTE network, commonly known as 3.9G In 20 10, the International Telecommunication Union officially defined LTE Advanced as 4G, with downlink speed of 299.6Mb and Internet access speed of about 700 K.:

4G refers to the ordinary 4G network, which is a popular network at present, and is also the user that the three major operators compete for. Downlink speed can reach 1Gb, and Internet access speed is dozens of times that of 3G.

4G+ is an upgrade of 4G, that is, carrier aggregation (CA) technology, which has been basically covered in developed cities and densely populated areas. The downlink rate can reach 300Mb, and the internet speed is twice that of 4G;

5G refers to the fifth generation mobile phone communication standard, which has not been officially commercialized. Recently, it was learned that China Telecom successfully built four 5G base stations in the Industrial Technology Research and Innovation Park in Jiangbei New District, with a total investment of over 300 million. I believe that in the near future, we can use the 5G network. The network speed can reach 5m/s-6m/s.

Baidu encyclopedia -gprs

Baidu Encyclopedia-Mobile Network Mode