![]() Things get more nuanced when you try to either update from an old unsigned version to another unsigned, but newer version (for example from iOS 14.0 to iOS 15.1.1), or when you straight downgrade from the latest signed version to an older one.Īdditionally, you may hear about NONCE, NONCE Setter, TSS, and so on. As such, older versions tend to have more publicly available vulnerabilities that can be exploited to make a jailbreak possible. That time frame tends to be 90 days, but not always. The reason jailbreaks are often released for older iOS versions is that security researchers release their vulnerabilities or exploits publicly only after a certain time has passed since the vulnerability was patched in a release firmware. Rarely do we have jailbreaks available for the latest signed versions of iOS, so the consensus is that you should stay on a lower version and avoid updating until eventually a jailbreak gets released for your version. ![]() IOS Downgrades / Upgrades to unsigned iOS are usually done for jailbreak purposes. Although I have covered them on my channel in hundreds of videos, I will do my best to also explain what each of them represents here. If you are planning to downgrade or upgrade to an unsigned iOS version, you will face a few terms that may not be self-explanatory right from the start. ![]()
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