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iPhone19,4 Firmware Guide

Below you’ll find the complete set of firmware builds Apple has released for the iPhone19,4, split into signed and unsigned categories. Signed builds are your go-to for any current update or restore, since those are the ones Apple’s verification system still accepts. Unsigned builds are shown too, mostly as a historical reference, since downgrading to them is typically blocked once Apple stops signing that version. As with everything on this site, the actual files come straight from Apple, not from any mirror or third-party host.