3G, WCDMA, TD-SCDMA, CDMA2000 1X, EVDO, HSDPA, HSUPA, please explain it to me.

You don't have to copy it. After watching it for a long time, you will become more and more confused. Let me explain.

First of all, to correct it, 3G of telecom is cdma2000, also called EVDO, and cdma 1X is what we usually call CDMA network, not 3G.

EVDO refers to CDMA2000 data network.

HSDPA refers to the upgraded version of 3G network, commonly known as 3.5G, which can provide faster transmission rate than ordinary 3G network.

HSUPA refers to the extremely fast 3G network, which can provide faster network bandwidth than HSDPA.

Wcdma and TD-scdma have two modes: hsdpa and hsupa. Hsdpa is currently being used in China.

GSM refers to what we usually call 2G, which is the network operated by China Mobile and China Unicom.

GRPS is a data network of GSM, which provides low-speed data transmission service;

EDGE is an upgraded version of GRPS, which provides faster transmission speed than GPRS, up to 230K K K.

WLAN refers to wireless local area network.

WIFI is a kind of WLAN and the most common one. The signal transmitted by the wireless router is a WIFI signal.

WAPI is also a kind of WLAN. The standard is similar to that of WIFI, but the functions such as password verification are modified. WIFI and WAPI are compatible.

WiMax is a quasi-3g technology, which has not officially become an international 3G standard.