UMTS stands for Universal Mobile Telecommunications System. It is a third-generation (3G) mobile phone technology that was developed by the Third Generation Partnership Project (3GPP). UMTS is also known as Wideband Code Division Multiple Access (W-CDMA).
W-CDMA is a type of digital cellular network that uses spread spectrum technology to transmit data. Spread spectrum technology is a method of spreading a signal over a wider frequency range than would be required for a narrowband signal. This makes it more difficult for unauthorized users to intercept the signal.
W-CDMA is a more efficient way to transmit data than previous cellular technologies, such as GSM. This is because it allows for more users to share the same frequency band. W-CDMA also supports higher data rates, which makes it possible to transmit video and other multimedia content.
UMTS is the most widely used 3G mobile phone technology in the world. It is used in over 150 countries and has over 1 billion subscribers.
The other options are incorrect because:
- IS-95 is a second-generation (2G) mobile phone technology.
- GPRS is a packet-switched data service that is used in GSM networks.
- CdmaOne is a 2G mobile phone technology that uses Code Division Multiple Access (CDMA) technology.