Count Federal Communications chairman Tom Wheeler as one of the people who is happy that Sprint decided to call off its proposed $32 billion merger with T-Mobile. In a brief statement released on Wednesday, Wheeler expressed satisfaction that there would still be four major wireless carriers in the United States and added that Sprint should now take this opportunity to actually improve its network and service offerings instead of simply trying to acquire more spectrum through pricey mergers. “Four national wireless providers are good for American consumers,” Wheeler wrote. “Sprint now has the opportunity to focus their efforts on robust competition.” Sprint’s big chance to regain some of the ground it’s lost to its rivals will come next year when