Can I Downgrade iPhone 4s?

iPhone 4s (iPhone4,1) - Front view

iPhone 4s

iPhone4,1

A1431
A1387
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Downgrade is Possible

Downgrade to iOS 9.3.5 is Currently Supported

Apple is currently signing multiple iOS versions simultaneously. This temporary signing window overlap allows you to restore your iPhone 4s to the older build(s) listed below using a computer without encountering verification errors.

iOS 9.3.5 13G36

August 25, 2016

Downgrade Target
Firmware History for iPhone 4s
iOS 9.3.6 13G37

July 22, 2019

Signed
iOS 9.3.5 13G36

August 25, 2016

Signed
iOS 9.3.4 13G35

August 4, 2016

Unsigned
iOS 9.3.3 13G34

July 18, 2016

Unsigned
iOS 9.3.2 13F69

May 16, 2016

Unsigned
iOS 9.3.1 13E238

March 31, 2016

Unsigned
iOS 9.3 13E237

March 28, 2016

Unsigned
iOS 9.3 13E233

March 21, 2016

Unsigned
Frequently Asked Questions

Can I downgrade from an iOS Beta on iPhone 4s?

Yes. If your iPhone 4s is running an iOS 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 iOS version iPhone 4s originally shipped with?

No. Apple permanently closes the signing window for older releases. Even though iPhone 4s originally launched with an earlier version, Apple servers will no longer authenticate that installation.

What can I do if I cannot downgrade iPhone 4s 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 iPhone 4s 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 iPhone 4s 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.