Technically speaking, you're not supposed to be able to install emulators on an iPhone to play classic games. But that doesn't mean it's not possible. Here's how to install emulators on any iOS device, no jailbreak required.
Although iOS 7 won't see an official release until September 18th, you can install the final version right now even if you're not a developer thanks to some anonymous public postings of the software update files.
iOS: Technically, Apple doesn't allow game emulators into the App Store. However, every once in a while, an emulator sneaks in. Remote File Manager is one of those apps.
iOS 7 is coming to your iPhone and iPad next Wednesday, but a lot of its best features are available through third-party apps and jailbreak hacks right now. If you want to get in on the action without losing your jailbreak, here a few ways to add some of the new functionality.