Assuming iOS 6 GM Public version is launched tomorrow, will i be able to update my existing iPhone to iOS 5.1.1 ? I am planning to buy iPhone 3GS and iPhone 4S after the next iPhone is launched. I am concerned that the 3GS that i buy might be on a pre-5.1.1 version and i would want to update to 5.1.1 but if iOS 6 is released then i might not be able to update it to 5.1.1 ? What should i do in this scenario ? Anything i can per-emptively do ? I currently have an iPhone 4 and iPod Touch and both are on 5.1.1 and JBken.