iOS 7 getting Beta 5? Looking likely
All good software houses do it; they release alpha, beta and release candidate versions of their software to allow private and/or public users to try it, gauge their reaction and from any feedback make changes where required. Apple is no different, with iOS 7 having released up to beta 4 to date.
With new hardware arriving sometime in the Fall, 20th September is being touted as the possible date for the next iPhone launch. iOS 7 beta 4 is due to expire on 12th September, so with a possible nine days between expiry of the OS and the release of the new hardware, the likelihood we will get a beta 5, before the Golden Master, is quite high.