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Re: Best quote by Karl Bode is LTE4? What are you talking about? Verizon has LTE Release 8 deployed. Sprint has Release 9, and will have LTE-A online in a year or two. T-Mobile will start with Release 9 as well, and move to LTE-A shortly thereafter. AT&T is probably on Release 8. No LTE4 though.
Also, there's only so much bandwidth that you can cram into one MHz of spectrum with a given signal. LTE is already more susceptible to signal quality based speed fluctuations than, say, EvDO. You can up the modulation to 256QAM, sure, but then you're only increasing speeds by one-third, and you have to be close t the center of the cell to get those speeds. You can go from 2x1 MIMO to 3x3, but where are you going to put a third transmit antenna on a phone?
Sure, you'll be able to hit 100 Mbps per subscriber over channel bonded TD-LTE in 2500MHz in two years' time. However you've seen what Clearwire's coverage is now. It won't be any better in those cases, possibly worse since their network will be a relief network rather than the main event.