How to Create an Alphanumeric Passcode in iOS | Mac|Life - 0 views
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John Evans on 22 Dec 11"y 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."