If your iPhone or Android smartphone PIN starts with 1234, 0000, 2580, 123456 or 654321, you are in a soup as these PINs are most prone to hacking as your device can be unlocked easily by others.
According to the study, the 10 most popular four-digit PINs are: 1234, 0000, 2580, 1111, 5555, 5683, 0852, 2222, 1212, 1998.
The most popular six-digit PINs are and 123456, 654321, 111111, 000000, 123123, 666666, 121212, 112233, 789456,159753.