: A permanent restore that boots normally without a computer. Tools : Legacy iOS Kit or FutureRestore .

The 5s originally shipped with iOS 7.0. When Apple released iOS 7.1, they issued a "delta" OTA update. The signing keys for that specific delta update were left active. This tool tricks the iPhone into thinking it is receiving an official OTA update to iOS 7.1.2, even though Apple no longer signs the full IPSW.

Downgrading an is technically possible in 2026, but it comes with significant functional compromises unless you already possess saved SHSH blobs from a previous installation of that specific version. Core Requirements To perform this downgrade, you must have: A Mac computer