Which of the following 3G standard is used in Japan?

Solution (By Examveda Team)

3G Standard: 3G (Third Generation) refers to the third generation of mobile telecommunications technology, offering higher speeds for data transmission and more efficient wireless communication compared to its predecessors.

Option A: Cdma2000
Cdma2000 is a 3G mobile telecommunications standard based on code-division multiple access (CDMA). It is widely used in North America and some parts of Asia, including South Korea. However, it is not the primary 3G standard used in Japan.

Option B: TD-SCDMA
TD-SCDMA (Time Division Synchronous Code Division Multiple Access) is a 3G standard primarily used in China. It is a homegrown Chinese technology and not the standard used in Japan.

Option C: UMTS
UMTS (Universal Mobile Telecommunications System) is a 3G standard used in Europe and other parts of the world. It uses WCDMA (Wideband CDMA) as its air interface technology. Although it is a common 3G standard, it is not the standard used in Japan.

Option D: UTRA
UTRA (UMTS Terrestrial Radio Access) is the radio access technology used in UMTS. It is not a standalone 3G standard but part of the UMTS framework. Since UMTS is not the primary standard in Japan, UTRA is also not the answer.

Correct Answer: Option A: Cdma2000
Japan predominantly uses Cdma2000 for its 3G services. The country's major telecom operators, such as KDDI, have adopted this standard for efficient mobile communication.