Wireless company Sprint Corp (S.N) would operate as many as 1,750 of those stores under an agreement with Standard General, Sprint said separately. RadioShack’s bankruptcy, which has been expected for months, follows 11 consecutive unprofitable quarters as the company has failed to transform itself into a destination for mobile phone buyers. RadioShack said in a statement that the Standard General affiliate, called General Wireless, would acquire between 1,500 and 2,400 of its 4,100 stores.