South Korea based service provider SK Telecom is reportedly in talks with Harbinger Capital Partners to invest about a US$100 million  in LightSquared.

"We are in talks with Harbinger to decide investment terms," an spokesperson SK told Reuters.

If SK agrees on investment in LightSquared, it would be the firm's re-entry in the USA after it sold local unit Helio in 2008, Reuters said.

LightSquared  plans to build a wholesale nationwide 4G-LTE wireless broadband network integrated with satellite coverage allows partners to offer terrestrial-only, satellite-only, or integrated satellite-terrestrial services to their end users.

LightSquared  & Nokia Siemens Networks have signed an 8-year agreement worth $7 billion to deploy, install, operate, and maintain LightSquared network. NSN has to lauch services by middle of next year and expected to have 92 percent coverage of the United States by 2015.

Under the requirement set by the FCC, Harbinger must build out its network to provide U.S. coverage to 100 million people by the end of 2012, 145 million people by the end of 2013, and 260 million people by the end of 2015.