AT&T has announced that it will start selling new LTE/HSPA+ devices USBConnect Momentum 4G and AT&T Mobile Hotspot Elevate 4G in stores and online Aug. 21. AT&T also confirmed data pricing for data-only mobile broadband devices on the company’s forthcoming LTE network.

Customers will be able to choose 5 gigabytes of data for a monthly rate of $50 with any additional data consumed available for $10 per gigabyte. The LTE-upgradeable AT&T USBConnect Adrenaline will also be able to be updated to LTE beginning Aug. 26.

AT&T recently announced plans to roll out 4G LTE in five markets – Atlanta, Chicago, Dallas, Houston, and San Antonio – later this summer. Customers with compatible devices and 4G LTE coverage in those markets will be able to access to LTE as AT&T’s LTE is turned up. 

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