Sprint announced the next 20 cities in its LTE rollout, including parts of the San Francisco Bay region, sections of Indiana and southwest Florida. These rollouts are underway. Sprint's LTE network is currently active in 24 markets across the country.
“We’re committed to providing improved 3G and 4G LTE as quickly as possible, and keeping our customers informed as to when and where they can experience the new network’s superior performance and speed,” said Bob Azzi, senior vice president-Network, Sprint.
http://www.sprint.com/4glte