Can I Downgrade iPad 4 (WiFi)?
Downgrade is Currently Not Supported
Apple is currently only signing iPadOS 10.3.3 for iPad 4 (WiFi). The signing window for iPadOS 10.3.2 and all earlier releases has closed.
Apple permanently closes the signing window for older releases within 1 to 2 weeks of launching a newer update. Because Apple's servers authenticate each restore online, trying to install any previous iPadOS build on iPad 4 (WiFi) will immediately fail with iTunes Error 3194.
July 19, 2017
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Can I downgrade from an iPadOS Beta on iPad 4 (WiFi)?
Yes. If your iPad 4 (WiFi) is running an iPadOS Beta, you can always restore back to the latest signed public release using Recovery Mode in Finder (Mac) or iTunes / Apple Devices (Windows).
Can I downgrade to the iPadOS version iPad 4 (WiFi) originally shipped with?
No. Apple permanently closes the signing window for older releases. Even though iPad 4 (WiFi) originally launched with an earlier version, Apple servers will no longer authenticate that installation.
What can I do if I cannot downgrade iPad 4 (WiFi) but experience battery or performance bugs?
You can perform a clean restore to the latest signed firmware using a computer to eliminate software glitches and corrupted cache, or await the next minor point update from Apple that includes targeted bug fixes.
Can I downgrade iPad 4 (WiFi) if the signing window has closed?
No. Apple servers reject restore verifications for unsigned builds (returning iTunes Error 3194). Unsigned firmware cannot be installed on standard Apple devices.
Will restoring or downgrading iPad 4 (WiFi) erase data?
Yes. Flashing an IPSW firmware file requires a restore that wipes on-device storage. Ensure your personal data is backed up to iCloud before proceeding.