AT&T started out small, but it made a promise to blanket 15 cities with LTE by the end of the year, and by golly, it's going to keep it. In its press release announcing the Samsung Galaxy Tab 8.9, it also mentioned six additional markets to be graced by the super-fast speeds on November 20th. So by this time next week, customers in Charlotte, Las Vegas, Kansas City, Oklahoma City, Indianapolis and San Juan, Puerto Rico will be able to make their HTC Vivid, Jetstream and Samsung Skyrocket go a-blazin'. New York City? Sorry, not this round, but we're making progress. Check out the press release tidbit after the break.