Cause: Corrupted NVRAM from a failed bypass.
Fix: Re-run the Sliver method with the “Clear NVRAM” checkbox enabled.
What does “extra quality” mean in this context? It’s not about screen resolution. It’s about persistence.
The “extra quality” methods leverage a bug in iOS 9’s SpringBoard lockdown state machine—a race condition where the OS checks for a lock file after loading the home screen, giving the exploit just 300ms to delete the file before the OS realizes it shouldn’t be there.
For users without receipts, the following workflow provides the best user experience on iOS 9.3.5.
The most famous tool for this is Sliver (part of the legacy suite from the same developers as Checkra1n). Here is the technical flow of the "extra quality" bypass (the version that survives reboots for a limited time):
Result: The iPhone 4s wakes up. The Apple ID prompt is gone. You can use the camera, notes, music, and even make emergency calls.
For professionals seeking the highest quality (access to recovery mode, full reset), Apple Configurator 2 on macOS Mojave (10.14) can force-prevent activation checks on the iPhone 4s.
