Huawei might be making inroads into the US consumer smartphone market, but the Chinese telecom supplier's attempts to break into big business have been stonewalled. Now, the Wall Street Journal reports that Sprint is excluding both Huawei and competitor ZTE from a multi-billion dollar contract -- where they would have been the lowest bidders -- primarily because of national security concerns. The US Secretary of Commerce reportedly called Sprint CEO Dan Hesse to voice concerns about letting firms with possible ties to the Chinese government supply local communications infrastructure, a perspective also penned by eight US senators back in August. "DoD is very concerned about China's emerging cyber capabilities and any potential vulnerability within or threat to DoD networks," the Department of Defense told the publication, without naming Huawei or ZTE directly. We're not doctors, but it sounds like someone's got a serious case of supercomputer envy.