AT&T's announced the upcoming launch of two  devices that will make use of the company's imminent 4G LTE network: USBConnect Momentum 4G and Mobile Hotspot Elevate 4G. No, they're not phones. USBConnect Momentum 4G allows users to access 4G LTE where it's available and, when out of range, access the company's HSPA+ network. The Mobile Hotspot allows access on up to five WiFi enabled devices, and also works with either LTE or the HSPA+ network. Both have an expandable memory slot that supports microSD cards up to 32 GB. They'll work overseas as long as you don't mind paying the roaming charges. The USBConnect Momentum will sell for $49.99 (with a two-year contract and after a $50 mail-in-rebate). The Elevate will sell for $69.99, with the same contract and rebate.  Both should be available later this summer. That's also when AT&T expects to roll out its 4G LTE network in Atlanta, Chicago, Dallas, Houston and San Antonio.  The company says it will be in at least 15 markets by the end of this year, and to add 20 more 4G devices to its line-up, though only some will be LTE compatible. Source: AT&T