This method works by exploiting how iOS checks for updates. By editing a system file, you can trick your iPad 2 (running iOS 9.3.5) into thinking it's running an older version of iOS (6.1.3). This, in turn, allows it to see iOS 8.4.1 as an over-the-air (OTA) update, which you can then download and install directly.

If you're comfortable with the command line, more advanced tools offer a more direct restore method.

This is the critical step where the device is "pwned" to accept the custom firmware.

How to Update an Old iPad from iOS 9.3.5 | Expert Q&A - JustAnswer

Download the Phoenix IPA file and a side-loading tool like Sideloadly or Cydia Impactor to your computer.

: The animations are fluid again, and the "heaviness" of iOS 9 vanishes.

This step is automated in tools like 3uTools but can be done manually. The goal is to generate a valid OTA Update Ticket.

Downgrading an iPad 2 from iOS 9.3.5 to 8.4.1 is a specific and somewhat advanced topic. Because Apple stopped signing iOS 8.4.1 many years ago, a standard restore via iTunes is impossible.

| Aspect | iOS 9.3.5 | iOS 8.4.1 | |--------|-----------|-----------| | | Good (many apps require iOS 10+) | Poor. Many apps now require iOS 10 or 11. You'll need older app versions. | | Security | Last update 2018 | Last update 2016 (vulnerable to several exploits) | | iCloud/Service | Works fully | iCloud Drive, Messages, Mail work. Some new features missing. | | Method | Official restore | Unofficial "OTA spoof" method |

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