Re-encrypt (for compatibility with iBEC/iBSS) – optional, if you are using a bootrom exploit or patched iBSS . Many custom firmware workflows skip re-encryption and use a patched iBSS that accepts unencrypted images.
By dropping a custom IPSW onto this device, you bypass the planned obsolescence of iOS 9 and unlock a machine that, by all rights, should have been dead a decade ago. iphone 4s custom firmware
⚠️ : iPhone 4s has no public untethered bootrom exploit for A5. All custom firmwares are tethered or semi-tethered – you must re-run the boot tool after power off. by all rights