is the most accessible tool for the 4s. It works on macOS and Linux.
However, the 4s has one fatal hardware flaw—or savior, depending on your perspective—that later iPhones lack: .
For vintage Apple enthusiasts and jailbreak historians, the iPhone 4s holds a unique place. It was the last device Steve Jobs introduced before his death, but it was also the first iPhone to ship with the assistant that would define a decade: Siri . And Siri, in its original form, was deeply tied to iOS 5 .