Re: How To Unlock BlackBerry 8520 For Use On AT&T
Verizon or Sprint? If you have service already through either of those carriers you call and get the unlock code (say you're goin out of the country) this unlocks the sim. then you can put in a att sim and do service books etc. Register first at blackberry.com then send service books from there.
You can buy unlock codes for a nominal cost from several online sources also.
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BrennB
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