Downgrading your iPhone 4S to iOS 5 requires some technical expertise, but with these steps, you should be able to achieve it. Keep in mind that downgrading may void your warranty, and you may not receive future iOS updates. If you're experiencing issues or have further questions, feel free to ask in the comments.

When it finished, the iPhone awoke to iOS 5—not by magic but by the slow arithmetic of files and signatures. The lock screen felt familiar in a way new phones rarely manage: simple, tactile, honest. The notification system was different—less intrusive, more forgiving. Twitter was a mercenary, not a diary. Apps fit in rows that didn’t pretend to be infinite. There was space on the screen; there was room in his life.

Your screen may turn green or show various lines of text; this is normal.