As akosnitzky stated, this is the method for GSM phones to be used on other networks. For example, for a T-Mobile BlackBerry to be used on AT&T.
It has nothing to do with the device's password.
The difference between stupidity and genius is that genius has its limits.
When you take things for granted, the things you are granted, get taken.
Even a mosquito doesn't get a pat on the back until it starts to work.
Too many people miss the silver lining because they're expecting gold.
[BES 5.0.3 / GroupWise 2012 HP2]