I'm about to buy my 1st smart phone which will be the iphone4. I'm concerned about AT&T's new data plans. I will occasionally use radio apps to stream some local radio sports talk shows. Does streaming radio through an app use much data? It would not be through wifi since my gym is not a hot spot? It seems like I would need the 2gb plan. I'm talking about 8-10 hours a week of listening to am radio using an app. Thanks for any feed back.