U.S. electronics chain RadioShack filed for bankruptcy on Wednesday for the second time in a little over two years, faced with a challenging retail environment and an unsatisfying partnership with wireless provider Sprint Corp. The Chapter 11 filing comes after RadioShack, owned by General Wireless Operations, tried to revitalize its business by co-branding stores with the wireless carrier in an effort to compete against their largest rivals. General Wireless, which acquired the RadioShack brand in 2015, listed assets and liabilities in the range of $100 million to $500 million in the U.S. bankruptcy court for the Delaware district.