Prepaid carrier Straight Talk now offers LTE service to those with compatible AT&T devices

LTE is starting to become a reality for prepaid customers on inexpensive plans. Straight Talk, a carrier formed from a partnership between Walmart and Tracfone, is now allowing users who bring smartphones capable with AT&T's LTE network to use the 4G data service. You'll need to buy a new SIM card for $6.99 to get the service, but once you do, you'll get "unlimited" data, talk, and text for $45 per month (or international calling on top for $15 more per month). And unlike some other services, yo...