I upgraded over the phone with Orange.
They told me that my tariff included 'X' amount of minutes + unlimited texts and internet usage.
I've been with Orange for years and I've never once had data coverage as part of my tariff so I've literally never touched the internet on my phone before (I don't really see the point in it to be honest).
Given that it was free when I upgraded I do use it from time to time but very sporadically and not for very long (usually to check football scores or the occasional Facebook catch up).
I had a problem with my first bill (I had around £8 worth of data charges). Not a massive issue I know but I rang them anyway to query, eventually they said it was a mistake at their end and they'd credit my account the following month. I never received the credit but I never had any data charges since so I let it go (a mistake on my part I am beginning to see).
2 or 3 months later I now have this issue and I am not happy!!!!