Remember: The iPhone 4s on iOS 5 is the last iPhone that felt like a polished instrument rather than a glass slab. Follow this guide carefully, keep a spare USB cable handy, and never let that battery hit zero.
You cannot officially downgrade an iPhone 4s to iOS 5 because Apple has stopped "signing" that firmware, which is required for a standard restore through iTunes.
on iOS 5. This downgrade is primarily for nostalgia, speed, or using the device as a dedicated music player. Jailbreaking
Be realistic: