Verizon software update ‘bug’

I recommend that everyone update their Verizon phones using the *228 feature on a regular basis.  My daughter did this last night, and after the software update (option 1), her phone reset.  No problem, this is often required after a firmware update.  However, after the reset, her security code changed.  It took us a few minutes to guess that is was reset to the last four digits of her phone  number.

Is this a bug or a feature?  This is a feature, but not well documented.  I found it after searching the Verizon forums.

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