Question: AT&T adding a BB data plan.
 

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?

Re: Question: AT&T adding a BB data plan.
 

They'd still add the data plan. They don't give a crap if you can't use it. All they want is to bill you.

Re: Question: AT&T adding a BB data plan.
 

Yeah, I think that they would add the data plan based upon the IMEI of the device being active in the system. I don't think that the fact that the PIN wasn't "clear" would change this.

Re: Question: AT&T adding a BB data plan.
 

So you'd have the BB data plan on your account and be billed for it, but you wouldn't be able to use it.

Re: Question: AT&T adding a BB data plan.
 

Yes, I believe so.

Re: Question: AT&T adding a BB data plan.
 

Got it. I thought this might be a way for folks who want a BlackBerry on AT&T without the data plan to use it simply for voice and text. A loophole. But no, it's not happening.

Re: Question: AT&T adding a BB data plan.
 

When AT&T finds the IMEI identified as a BB or smartphone, and it is not associated with the correct data plan, they will add it. Took 26 minutes to find it on my 9000 when I brought it up to test.