Refurbished and Used Cell Phones are capable of 3G and 4G speeds while costing less than comparable technology that's come straight from the factory. Refurbished BlackBerry Cell Phones are very inexpensive compared to their brand-new counterparts, even though they run on the latest technologies like 3G and 4G. About 85% of the world's cellular phone users are running on either 2G or 3G technology. Though considered relatively slow, with limited data rates, 2G is preferred by over 70% of the cellular network market. In the last few years, new networking technologies are being developed to offer faster data transfer in competitive rates and a wider bandwidth - such as 3G. 3G offers up to 2Mbps data transfer speed, but practically speaking its max speed is closer to 400kbps. Three quarters of cell phone users still prefer 2G over the new networking technology. That might change soon. HP and a Japanese development company, NTT DoCoMo, are developing a new technology, 4G. It is estimated that 4G technology will be launched in Japan in the next 6 years. There aren't enough details about this new technology so we can't really compare it to anything we have now, but it looks like it's going to be a lot faster, using wider bandwidth, and cheaper - or in one word: BETTER. Whad we DO know about 4G is that with 4G, we will be able to make a video conference call - 3 or more callers - and video will be transferred a lot smoother, thanks to the wider bandwidth. Those devices will have wireless internet in bandwidths wider than that used by 2G technologies, never before seen in a mobile phone - 100MHz; which will also cut costs on large data transfers, and will make video and music downloads cheaper. New security features will help better protect users from theft and fraud, and network security will get much tighter. Data transfer speed reaches new levels with the new technology: up to 1Gbps (!). Some features that were supposed to be included with 4G seem as if they were taken from a sci-fi movie about the future. Researchers are working on features that would allow the cell phone user to know the direction from which the call is coming and how far away the caller is. Also, we will be able to speak using our other senses as well, or without having to use our vocal cords at all. These features will probably not be ready in time for the launching of 4G, but developers promise "they'll come in time for 5G." Meanwhile, until we get 4G technology in the United States, we will soon have a kind of in-between technology dubbed super 3G. There's not much information about this technology, besides that it is planned to have a high speed data transfer of up to 100Mbps.
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