The Federal Communications Commission said Monday that it will appeal to the Supreme Court in an effort to retrieve 63 wireless telephone licenses, worth billions of dollars, from bankrupt carrier NextWave Telecom.

At the same time, the carrier is preparing to unveil a $5 billion financing package to build a new national wireless network. The debt and equity package will be part of a reorganization plan that NextWave plans to file in a New York bankruptcy court Monday evening.