![]() I personally ran noncestatistics to figure out what nonce is generated the most on my iPhone 5s (this only works with devices that have collisions). This makes it really convenient to make the device generate the same APNonce which is also inside your APTicket (in case you know the generator for that nonce). This allows you to put a generator in NVRAM to force generate a specific APNonce. If you're jailbroken (with tfp0), you can use the generator method. You can't go from iOS 10 to iOS 9 either. You need to be careful though, because if Apple releases a new version of iOS (say, 10.3) has a new SEP that no longer works with 10.1.1, and they stop signing iOS 10.2, than you can't even really restore to 10.1.1. Right now, it only makes sense to restore to 10.x, as the SEP in iOS 10 does not work with iOS 9 (and probably lower). futurerestore allows you to select a version of iOS and an APTicket to use during restore, as well as a baseband and SEP (which will get a fresh ticket and restored). Prometheus itself is the idea to restore a firmware by using replayed tickets and upgrading the SEP and baseband. Prometheus is not really limited to any specific version of iOS. ![]() ![]() This FAQ guide was originally written by tihmstar. Jailbroken 64-bit device (except some iPhone 5s and iPad Air devices, excluding iOS 10.2.1) that generate the same nonce multiple times.Prometheus is a method that can be used to upgrade/downgrade previously signed iOS versions on 64-bit devices. ![]()
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