3G Connectivity

3G connectivity of mobile telecommunications technology popularly known as 3G is an International Telecommunication Union (ITU) specification that promised an increase in bandwidth of up-to 384kbps.

W-CDMA is the most common deployment, commonly operated on the 2,100 MHz band. A few others use the 850, 900 and 1,900 MHz bands.
HSPA is an amalgamation of several upgrades to the original W-CDMA standard and offers speeds of 14.4 Mbit/s down and 5.76 MBit/s up. HSPA is backward-compatible with and uses the same frequencies as W-CDMA.

HSPA+, a further revision and upgrade of HSPA, can provide theoretical peak data rates up to 168 Mbit/s in the downlink and 22 Mbit/s in the uplink, using a combination of air interface improvements as well as multi-carrier HSPA and MIMO.

Technically though, MIMO and DC-HSPA can be used without the “+” enhancements of HSPA+ The CDMA2000 system, or IS-2000, including CDMA2000 1x and CDMA2000 High Rate Packet Data (or EVDO), standardized by 3GPP2 (Different from the 3GPP), evolving from the original IS-95 CDMA system, is used especially in North America, China, India, Pakistan, Japan, South Korea, Southeast Asia, Europe and Africa.

CDMA2000 1x Rev. E has an increased voice capacity (in excess of three times) compared to Rev. 0 EVDO Rev. B offers downstream peak rates of 14.7 Mbit/s while Rev. C enhanced existing and new terminal user experience.

While DECT cordless phones and Mobile WiMAX standards formally also fulfill the IMT-2000 requirements, they are not usually considered due to their rarity and unsuitability for usage with mobile phones.

Begining of 3G the Network

The first 3G(UMTS) to launch in Africa was by Emtel in 2004. The firs pre-commercial of 3G (W-CDMA) was launched by NTT DoCoMo in Japan in 1998 branded as FOMA (Freedom Of Mobile Access) and first first to commercialise in 2001.

Some 3G devices

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