You reveal your code’s digits through fingerprint smudges on your smartphone screen.
You can make the passcode you use to unlock your device stronger with a few simple tricks. It turns out that repeating one or two digits in your 6 or 7-digit passcode makes it much stronger. Be sure you use at least six digits.
Here are the details.
| A 6-digit passcode is strongest when it contains only 5 distinct digits. | ||||
| Distinct digits | Possibilities | |||
| 6 | 720 | |||
| 5 | 1800 | |||
| 4 | 1560 | |||
| 3 | 540 | |||
| 2 | 62 | |||
| 1 | 1 | |||
| For a 7-digit passcode, use only 5 different digits to get the strongest code. | ||||
| Distinct digits | Possibilities | |||
| 7 | 5040 | |||
| 6 | 15120 | |||
| 5 | 16800 | |||
| 4 | 8400 | |||
| 3 | 1806 | |||
| 2 | 126 | |||
| 1 | 1 | |||
| Note: The 7-digit passcode is over 9 times as strong as the 6-digit code. | ||||
| The Mathematical Reason Your Passcode Should Repeat A Digit – YouTube video | ||||