Learn how to change the passcode on your iPhone, iPad, or iPod touch, and customize it if you’d like to use an alphanumeric passcode.

To learn more about this topic, visit the following articles:
Use a passcode with your iPhone: https://apple.co/2WE8mUg
Use parental controls on your child's iPhone, iPad, and iPod touch: https://apple.co/3LX2sDy

Additional Resources:

Get Support for iPhone: http://apple.co/iPhone

To subscribe to this channel: https://www.youtube.com/c/AppleSupport

To download the Apple Support app: http://apple.co/2hFtzIv

Apple Support on Twitter: https://twitter.com/AppleSupport