My phone is eligible for an upgrade July 18th, and I would like to get the blackberry bold, but I'm not sure exactly how the data plans work. I know it is $30 a month, but can you stop that service anytime you want and just not have access to internet or does att require it for the whole time that you have a contract? And the same with the iphone, i understand the phone would be basically useless without the data plan anyways but just wondering, and does the package include texting and multimedia messaging? I hope you can understand what I'm trying to ask, and thank you for responses in advance 