I was going to add a line to my account for an elderly family member. I plan to pick them up an iPhone 4 (not a great time for it but oh well). They have an iPod now, but want to replace their cell while having text messaging, iPod features, and some simple games. The data charge is the annoying bit. I plan to put them on 300 MB AT&T package. Should that be enough for using Google voice text messages and iMessage text messages each month? They won't use Safari or anything, I can even disable Safari if I have to. They hate it on the iPod because of their eyes. My mother is on the 250 MB plan but she doesn't text at all and only uses about 40MB a month. ha. Just not sure if they do like 1000 Google voice or iMessage texts if these apps suck down extra data for maintenance and checks and whatnot. At home it will connect to their wifi as well. Thanks.