It turns out that many people think they have a safe passcode but in reality that passcode is so common it's no safer than having no passcode at all.
Here is the top ten of most common passcodes used on iPhone, iPod Touch and iPad:
1234, 0000, 2580, 1111, 5555, 5683, 0852, 2222, 1212, 1998
It stands to reason that other mobile devices that allow the user to set a four digit passcode will have the same issue. If you are using one of the above passcodes you should seriously consider changing it to something else.
(Read the full analysis here)
