Although expected next week,Apple has just sent out iOS 7 beta 6 for developers. The update is available over-the-air immediately, with the system files—for the iPhone, iPad, iPad mini and iPod touch—likely to follow online at Apple’s iOS developer website at any time now. The update fixes an “issue with iTunes in the Cloud, where some purchases may download or play unexpected items.” 

This software may be the last beta prior to the GM (gold master) version of iOS 7, due in advance of Apple’s upcoming iPhone event on September 10, 2013.