Question: AT&T adding a BB data plan.
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So we know that if you use a BlackBerry on AT&T and don't have a BB data plan AT&T will periodically scan for ESN's and simply add the BB data plan to any account without one.
What would happen if somebody bought a used BlackBerry that was still registered to a BIS account with another carrier? You could pop your SIM card into it and use it for voice and sms. AT&T would eventually detect it as a BlackBerry without a data plan and attempt to add one. But the device won't be able to be registered on the AT&T BB data plan because of the prior BIS registration. How would AT&T handle this?
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