Verizon as promised today confirmed the launch of its LTE-based 4G network. The service will go live in all of the planned 38 initial cities, including 60 airports, on December 5. Average speeds should be about 10 times faster than Verizon's 3G, at between 5Mbps and 12Mbps; the performance is enough that 20 typical photos could download in one minute or a single song in four seconds, Verizon said.