By holding down the home button on your iPhone, you – and anyone else – can quickly access Siri even without entering a passcode. She won’t let you access any apps, but addresses and directions aren’t off limits. To make your phone more secure, go into Settings, General, Passcode Lock, and turn Siri “off.” This keeps her completely hidden beneath the passcode lock, making it impossible for anyone without the passcode to access her wealth of information.

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