iOS 9 will be released tonight and I know that many of you are using a beta or GM version of the operating system, so you are probably wondering under what conditions you can update to the final version of iOS 9.
If you have it installed iOS 9 beta or public beta on your iPhone, iPad or iPod Touch, Apple will send you a notification to install iOS 9 through the Software Update system, unless you have iOS 9.1 public beta installed, this version being, in theory, "newer".
If you iOS 9GM installed in your terminals, then you basically have the version that the Apple company will release today and the only situation in which you will receive an update notification is the one in which Apple has modified the GM build, but this seems unlikely.
If you jailbreak done, you will only be able to update to iOS 9 using iTunes and I have already explained it to you how you can install iOS 9, so follow the instructions listed there.
If you have other questions, I'm waiting for them in the comments.
