Apple ipod

I canceled my iPhone 3G data plan and I'm still using the phone. Is there any way you can follow?

Therefore Well, I have the iPhone 3G, but do not want to pay 30 a month for unlimited internet, because every time you use the Internet, I'm also on the wifi. I took my SIM card from my iPhone, called ATT and said did not use my iPhone and they want the data plan cancellation. Then I put the card in my iPhone and I am using it again. Is there any way this can be followed and I can get in trouble / fined for not have the data plan costs more obvious if I can use the Internet in places without wifi?

No, I did the same.

How to disable data on your iPhone 3G or updated iPhone