4G-LTE is a wireless technology capable of download speeds up to 10 times faster than 3G. That's roughly the speed of your home broadband network.
Carriers are rolling out 4G over the next few years, and they're in different stages of their expansion. Verizon currently has 371 markets covered nationwide, covering 75% of the U.S population. AT&T has 53 markets, covering 24% of the population. Sprint covers just 19 markets. Those numbers are in constant flux: All of the carriers plan to significantly increase their 4G coverage fairly rapidly.
Eventually, all three nationwide iPhone carriers say their 4G coverage will be as pervasive as 3G. Until then, users will find their iPhones shifting in and out of 4G. When your phone leaves a 4G zone, it will seamlessly move to 3G as a backup.
17 Sep, 2012
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Source: http://rss.cnn.com/~r/rss/money_topstories/~3/WAdWg0TJlPs/
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