Those problems began in February, after the Federal Communications Commission (FCC) rejected LightSquared's plans to launch its LTE network due to concerns that it would interfere with both commercial and military GPS technology. Because of this development, Leap Wireless has decided to buy future LTE connectivity for its Cricket prepaid service from Clearwire, another troubled wireless company (of which Sprint is the largest stakeholder). Earlier this year, LightSquared client FreedomPop also decided to go with Clearwire. But by far the biggest setback for LightSquared came in March after its $9 billion 15-year agreement with Sprint-Nextel to build and host its LTE network fell through.