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I changed the home button and screen of my iPhone and it is working but It’s ios is 11.0.3 and I want to update the ios to 12 will the phone work after that
Technically speaking, you can’t change the Home Button as it is paired to the logic board. Do you mean that you transferred it over from the original screen to the replacement screen? At any rate, unless you have a really low quality aftermarket screen, you should have no issues updating to iOS 12. There have been some scattered reports (lcd functionality ios 12.0.1) iOS 12 can cause LCD issues but it has been very rarely reported.
