Uninstall 14.3
How do I uninstall 14.3?!! It was an automatic update & it’s HORRIBLE for my 6S iPhone. Googled instructions were of no help.
iPhone 6s Plus, iOS 14
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There are no instructions to downgrade iOS, it is not supported by Apple. I would suggest that you turn off Automatic Updates so that newer updates are not automatically installed if you wish to check on them before you install them.