This error typically indicates you're trying to install an unsigned firmware version. Check the signing status at ipsw.me and ensure you're using a currently signed version.
The Secure Enclave Processor (SEP) handles your Face ID and passcode data. Even if you manage to patch an IPSW to downgrade your iOS version, if the current signed SEP is incompatible with the older iOS version, the restore will fail, or your Face ID will be permanently disabled until you update to the latest official iOS. iphone xr custom ipsw download patched
For most users, the safest path remains using standard, signed IPSW files through official Apple tools while exploring legitimate jailbreak solutions that don't require custom firmware modifications. As the iOS community continues to evolve, staying informed about new tools and techniques will help you make the best decisions for your iPhone XR. This error typically indicates you're trying to install