What is 4G, WiFi, Bluetooth, Infrared

This is the second (read the first part here) of the three part series of my quest towards making people a little more familiar with common mobile world related terms. I have tried to keep the language as simple as possible still incase any one needs any more clarification on any of the terms listed below or any other mobile term, feel free to contact me through this blog. I'll surely reply.

What is 4G?
4G, an acronym for fourth-generation wireless, is a technology that will transform wireless communications in a completely new way. It is also known as beyond 3G," since it provides a comprehensive and secure IP (Internet Protocol) solution. Users will enjoy high quality streaming video and "anytime, anywhere" voice and data at a much higher speed than previous generations.

The use of G, standing for generation, in mobile technology covers the major advances of the past 20-30 years. 1G technology involved the first widely available mobile phones. 2G technology, which began in the early 1990s, switched to a digital format and introduced text messaging. 3G technology improved the efficiency of how data is carried, making it possible to carry enhanced information services such as websites in their original format.

What Is WiFi?

Wi-Fi, which stands for wireless fidelity, in a play on the older term Hi-Fi, is a wireless networking technology used across the globe.
A wireless network uses radio waves, just like cell phones, televisions and radios do. In fact, communication across a wireless network is a lot like two-way radio communication.

Here's what happens:

a) A computer's wireless adapter translates data into a radio signal and transmits it using an antenna.
b) A wireless router receives the signal and decodes it. The router sends the information to the Internet using a physical, wired Ethernet connection.

What Is Bluetooth?
Ah, a very neat and clean technology (and its almost free): Conceived initially by Ericsson, before being adopted by a myriad of other companies, Bluetooth is a standard for a small, cheap radio chip to be plugged into computers, printers, mobile phones, PDAs etc.

Bluetooth® is the name of a wireless technology standard for connecting devices, set to replace cables. It uses radio frequencies in the 2.45 GHz range to transmit information over short distances of generally 33 feet (10 meters) or less. By embedding a Bluetooth® chip and receiver into products, cables that would normally carry the signal can be eliminated.

What is Infrared?
The infrared technology works through the straight line connectivity which works by in sight feature. It means your infrared port should be must pointed towards the other phone you wish to connect. But in market demand Bluetooth is popular as it is coming in 10 to 100 meter ranges depend according to the prices. Bluetooth also have a quality to read out the memory card and trace the other memory card. Bluetooth have very higher range of transferring the data as compared to other devices. It is the fastest too. And Free!!!!!

Voilla