In the Settings app, go to Accessibility > Touch > Back Tap and choose one of two options: double tap or triple tap. You should see a list of actions you can run by tapping the back of your iPhone, ...
OS has long let users set new default apps in a variety of categories, and the available options expanded in iOS 26.
Apple made the second betas of iOS 26.3 and macOS 26.3 available to developers on Monday. This comes almost a month after the first round, though Apple did test a new security system in early January.
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