Here's how to change it to keep your iPhone data safe by changing your lock ... digit passcode. It's done so since iOS 9 in 2015. You may just have missed that fact if you use a four-digit code ...

Tap Change Passcode (in blue text in the third ... From the menu that pops up, select 4-Digit Numeric Code, and the number of blanks in your new passcode will drop from six to four.

You can then switch your passcode among 4-Digit Numeric Code, 6-Digit Numeric Code, Custom Numeric Code, and Custom Alphanumeric Code. Make your choice, then type your new passcode .

With all this data stored on one device, it makes sense to use any security you can to lock your iPad ... you to create or change your passcode. The default is a six-digit code, but there are ...

In addition to enabling the passcode, you may want to adjust the time it takes the iPhone to auto-lock. You can choose ... Tap "Turn Passcode On." 4. Enter a six-digit passcode that you'll enter ...