Only 5 cities will have LTE coverage from AT&T at first with ten more being added to the list by the end of the year. Meanwhile, Verizon's 4G network is growing steadily and will likely be available in over 140 markets nationwide by the end of this year. Will AT&T manage to catch up within the given time frame and will it be able to match Verizon's speeds and coverage is anybody's guess, but at this moment chances are not in AT&T's favor.
AT&T's LTE network is to debut at some time within the second half of this year with subscribers in Houston, Dallas, Chicago, Atlanta, and San Antonio to be the first ones to give it a try.
source: CNN via PCMag