How do I downgrade IOS 26 to IOS 18 with backup

I need to remove IOS 28 and reinstall IOS 18, and keep backup data

iPhone 15 Pro Max, iOS 26

Posted on Sep 21, 2025 4:35 PM

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2 replies

Sep 21, 2025 4:47 PM in response to aabedo

This is not possible if you have installed the official release version of iOS 26.


This is possible if you are still running a beta version of iOS 26......and.....you made a special Archive backup on your Mac or PC of your iPhone while it was still running iOS 18.....before....you installed the beta.


Post back for more instructions if that is the case.

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How do I downgrade IOS 26 to IOS 18 with backup

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