Yesterday research firm OpenSignal found out that T-Mobile had launched 4G LTE in nine cities across the U.S. However, in the official press release Kansas City and Las Vegas were the only markets mentioned officially. OpenSignal indicates that T-Mobile customers are seeing LTE in Seattle, Denver, New Orleans, New York, San Diego, and the Bay Area. Speeds seem to be on par with Verizon and AT&T’s LTE network with tests showing a 25Mbps average download and 8Mbps average upload speed. When the network officially goes live in other markets and more people jump on the 4G LTE network users can expect their average speeds to drop slightly, but be substantially faster than their 4G HSPA+ network.