Jaxar:
You might have already thought of this but on the topic of avoiding future data complaints you might want to bear in mind a scenario where outside of wifi she tries to use a feature and her tech savy friend helps her with the problem by turning 3G data on.
Yeah, thats a valid point. Guess we'll see once school resumes. Thankfully she's on pre-pay, so we'll be able to gauge if (when) this happens before any significant financial cost is incurred.