This is probably a very simple question but I have an internet package with a certain amount of data allowance every month. I want to use this when I'm travelling around London and think I should simply turn on Mobile data.
However, I got stung by Virgin over the summer when they said there was a £2 charge per day for turning this on. So I got a £50 surcharge one month.
Can someone let me know what I should be doing so that I don't get another unexpected bill.