I believe Blackberry has a kind of locking feature for it's batteries. In the manual, it tells you to only use BB brand batteries (which every phone does, but that can be overcome) but it also says it must have the lock symbol on battery. I don't know how they can lock a phone to only use a certain battery but it seems they might have. Look at your factory battery, mine says C-2S with a locked lock symbol.
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T-Mobile Bold 9780
PIN: 236676A8
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