Nokia Siemens Networks (NSN) announced today that it has completed the second phase of U.S. Cellular's LTE service.

NSN has successfully launched an LTE network for U.S. Cellular and its partner, King Street Wireless, in 11 markets, covering select cities in Illinois, Missouri, North Carolina, Oklahoma, Oregon, Tennessee, Virginia, Washington and West Virginia.

NSN was selected by U.S. Cellular to provide Radio Access Network (RAN) and Mobile Management Entity (MME) technology for this portion of its LTE rollout.

Previously, NSN deployed Evolved Packet Core (EPC) and Home Subscriber Services (HSS) in the first wave of U.S. Cellular's LTE rollout. The installation of the LTE core was included in nine separate markets.

NSN has been doing well recently, giving a boost to Nokia's earnings. Nokia recently revised its fourth-quarter earnings for both its Devices and Services divisions, as well as NSN.

Nokia said it estimates NSN's net sales in the fourth quarter of 2012 were approximately $5.3 billion, and non-IFRS operating margin was between 13 and 15 percent, which compares to the previous outlook of approximately positive 8 percent, plus or minus four percentage points.

NSN reports it currently has 77 commercial references in place for the delivery of LTE and 206 WCDMA radio customers.