so i have the 15 dollar internet deal. and i have wifi at home so i use my internet a lot at home..so if i keep facebook open but not on the page and lets say my email..yahoo...do i get charged if im signed on or if im using the website like lets say im signed on, on facebook but im not using the website like lets say im texting will i get charged for using internet? do you get what i mean? thankss 