CDMA stands for Code Division Multiple Access. It is a technique used for digital communication, and wireless technology in particular, that involves multiplexing. Whereas conventional communication systems use constant frequencies, CDMA uses multiple access, or multiplexing. Multiplexing, in this case accomplished through the specific type known as spread spectrum, uses varied frequencies to transmit audio signals.
Click Here View Detail About What is CDMA?

The world of mobile phones is changing, daily it seems. All the rage these days is 3G, third-generation telephony, such as mobile Web browsing and other advanced functionalities. These 3G protocols are manufactured on the building blocks of 2G technologies, which were themselves revolutionary when they began to be used widely.
Click Here View Detail About What is GPRS?

GSM, or Global System for Mobile Communications, is a cellular phone protocol that is popular in many parts of the world, and is a chief competitor to the CDMA protocol in the United States. In fact, for those who have CDMA phones, they may find if they go to other parts of the world, such as Europe, their cellular phones will not work.
Click Here View Detail About What is GSM?