AT&T has launched commercial LTE services today in Atlanta, Chicago, Dallas, Houston and San Antonio. AT&T has earlier announced that it will launch LTE service in five markets on Sunday.

By the end of 2011, AT&T plans to offer 4G LTE to customers in at least 15 markets, covering 70 million Americans. 

source:AT&T website

AT&T had recently announced it's first 4G LTE/HSPA+ tablet HTC Jetstream which runs the Android 3.1 (Honeycomb) operating system, boasts a large 10.1” WXGA high-resolution display, third-generation Snapdragon 1.5 GHz dual core processor and an enhanced HD video experience with1080p playback and capture.

AT&T had started selling new LTE/HSPA+ devices USBConnect Momentum 4G and AT&T Mobile Hotspot Elevate 4G on Aug. 21. AT&T customers can choose 5 gigabytes of data for a monthly rate of $50 with any additional data consumed available for $10 per gigabyte.