By default, passcodes in iOS are only 4-digit numerical codes that aren't as secure as passwords using upper and lower-case characters, special characters, and numbers. If you want to make your iPhone, iPod touch, and iPad even more secure, it's best to create an alphanumerical passcode.
To begin, navigate to Settings > General > Passcode Lock. Once there, ensure that the "Simple Passcode" option is set to OFF.
With this option off, you are able to create alphanumerical passcodes instead of the simpler 4-digit codes that are inherently less-secure.
Next, tap on the "Turn Passcode On" button on the Passcode Lock screen. You will be prompted to enter your alphanumerical passcode. Note that you can use any character on the iOS keyboard as your password.
Keep these tips in mind when creating your alphanumerical passcode:
- Use unique characters and symbols to create stronger passcodes. By making the passcode as meaningless and random as possible, you are creating a strong passcode.
- Don't use dictionary names, personal information, or your real name in the passcode.
- Change passwords periodically. Changing passwords every 45 to 60 days results in higher security.
After typing the passcode, tap next; you will be prompted to re-enter your passcode for verification. Tap the "Done" button to save the passcode.
After saving the passcode, whenever you unlock your device (at the time-out interval set in Settings > General > Passcode Lock > Require Password, a keyboard will now pop up instead of the number pad. Type in your alphanumerical password exactly as you set it, and then press the OK button in the password field.
You can still make emergency calls by tapping on the blue "Emergency Call" button at the bottom-right of the keyboard.
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