How to lock your iPhone with a passcode and make it ‘virtually impenetrable’ to strangers — from your phone or remotely, if it’s lost or stolen
You should use a passcode to lock your iPhone, so only you can wake it from sleep and access the data and apps on it.
You can set the passcode and the delay before the phone auto-locks from the Settings app.
If your phone is lost or stolen, you can use Find My iPhone to put the phone in Lost Mode, which locks the screen (even if you never set a passcode) and shows a message on the lock screen.
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Locking your iPhone — which turns off the display and makes a passcode required to turn it back on again – is an easy way to protect your data and personal information.
If you don’t have a passcode enabled on your phone, you’re missing out on a virtually impenetrable way to prevent strangers from accessing your phone if it gets lost or stolen. And it keeps your phone safe from run-of-the-mill prying eyes as well.
In addition to enabling the passcode, you may want to adjust the time it takes the iPhone to auto-lock. You can choose a time from 30 seconds to 5 minutes.
How to lock your iPhone using a passcode
1. Start the Settings app.
2. Depending upon which model iPhone you have, tap “Face ID & Passcode” (for iPhone X or later), “Touch ID & Passcode” (for iPhones 5s and later) or “Passcode” (for the iPhone 5 or older).
3. Tap “Turn Passcode On.”
4. Enter a six-digit passcode that you’ll enter whenever you want to unlock your phone. If you don’t want to use the default 6-digit number, first tap “Passcode Options” and choose the kind of passcode you want to use: an alphanumeric password, a 4-digit number, or a custom number.
5. Confirm …read more
Source:: Business Insider