How to unlock blackberry my dad gave to me from his work?

if network unlock is what you are alluding to then try codes from http://www.mobileunlocksolutions.com/

Hello,

Yes it will work with with any provider

Yes you can use any other sim after unlocking as a regular phone & no changes in your usa contract & again you can use any sim or same old sim in that BB same like you can use BB purchased from other country can use in USA

How many tries you left ? only 10 tries for unlocking.

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After unlocking from this provider's code your blackberry not only work with any network, you can use your Blackberry in any part of world with any GSM networks including your browser & MMS picture messaging to work, yes with just one time entering code from your keypad.

They unlock from network who locked your blackberry & remove restrictions like Verizon or any

This site will help you a lot & good email & 24/7 phone support.

you can unlock almost any blackberry instantly here: http://gsmunlocklabs.com/instant-blackberry-unlock...