[BlackBerryLoverAppleHater]

First of all, I LIKE using a pay-per use data plan, and I have a blackberry (8700c) without a data plan, that was before the rule came out that you had to have one with a smartphone. So, if At&t knows that my phone is a blackberry, will it know the type of blackberry it is that I would have upgraded to? (Meaning putting my sim card into an unlocked phone). Or, if they know that the phone is different, will they add a data plan? Would having a blackberry, without a data plan before that announcement came out that you had to have one, keep At&t from automatically adding a data plan.

[blueyestm]

they will know that it is an updated blackberry and slap you with a data plan

[Mister Xiado]

If you stop using a smartphone, or use another smartphone, you lose your exemption. The only way to keep it with such a change is with a warranty or insurance replacement.

[blackberry-unlocking710]

AT&T adds data plan automatically but you can contact them and ask to avoid services.

[clvrbas]

They recognize what ever phone is being used on their network. If they force the plan, call them and tell them to take it off. My mother in law used a BB8310 without a data plan and SMS and voice worked just fine.