Your iPhone includes a lot of sensitive data, even if you may not realize it. If someone has your iPhone and is able to unlock it, then they might be able to access your email, website accounts, make purchases, and generally disrupt your life.
Fortunately your iPhone has ways to keep unwanted people out of the device, such as its passcode or fingerprint. But you might be worried that someone could simply guess a ton of passcode combinations, leaving you looking for an additional level of security. You can find this with an option that will automatically erase the iPhone after 10 failed passcode attempts.
How to Turn on the 10 Failed Passcode Attempt Option on an iPhone
The steps in this article were performed on an iPhone 7 Plus in iOS 12.1.4. Note that while this can keep someone unwanted out of your iPhone, it applies for anyone that incorrectly tries to sign into the device. For example, if you have a small child, they could inadvertently erase your iPhone by simply touching the screen a bunch.
Step 1: Open the Settings app.
Step 2: Choose the Touch ID & Passcode option.
Step 3: Enter the current passcode.
Step 4: Scroll to the bottom of the menu and tap the button to the right of Erase Data.
Did someone else save their fingerprint to your iPhone, but now you would like to prevent them from signing in? Find out how to delete a saved fingerprint on an iPhone so that the fingerprint can no longer be used.