so i had apps on my iphone that i believe were using/taking my credit/data. these apps were tap tap revenge and angry birds seasons. the phone has wifi and i have used facebook and google a couple of times. i got the phone last thursday and i had 96 dollars of credit/data. i have been using angry birds seasons and tap tap revenge a lot. i checked my credit/data ealier today and it was down to 42 dollars. i thought that this must be coz i had been texting and calling. but then later today, after playing quite a lot of angry birds seasons and tap tap revenge and checking my facebook about twice, i checked my credit/daata again and it said i had 11 dollars. i am really annoyed because apps arent supposed to cost money. i havent been downloading any extras or anything from the phone. please tell me why this could be happening!!!!