We are presuming a lot here, but if Apple sticks to previous launch schedules, the new iPhone 5 will launch on June 6th 2011.Why that date? Well, as a rule, Apple tends to launch the new iPhone on the opening day of the WWDC event. It has done this in 2008, 2009 and 2010. So it's odds-on that the company will do it again in 2011. The opening date of WWDC (aka Worldwide Developers Conference) is June 6th. Hence the presumption of the launch date and keynote speech by Steve Jobs. Followed by a media frenzy, much analysis and a surge in demand for the new smartphone.Interestingly, Apple has already teased a new mobile operating system. 'At this year’s conference we are going to unveil the future of iOS and Mac OS,' said Philip Schiller, Apple’s senior vice president of worldwide product marketing.That feeds into a story we ran yesterday, with rumours of a new operating system built around the cloud - a 'music locker' is almost certainly expected in the new iOS. However, those rumours also indicated that the platform is much-delayed, perhaps not ready for the new iPhone 5. Apple usually shows off its new platform ahead of a phone launch, not with it. As we said yesterday, Apple might launch the phone first, with the platform update later - or maybe it has got everything together in time for that June launch.Time will tell on that and indeed, if the new iPhone 5 does have an all-new design or the much-debated NFC connectivity. You'll be the first to know on launch night.