When I signed up to O2, one of the extra no-charge services I agreed to (why they got my email address) was that they’d let me know by email if I was exceeding my usual monthly bill.
I got an email like that from them on 29 November (my bill was due on 2nd December). I had exceeded my usual phone costs by over £70.
My phone plan gives me two hundred minutes a month free. Normally, I stay inside that ration quite easily. This month I’d finished my free minutes about half-way through a phone call on 22nd November, and thereafter, every phone call had been charged at a rate of £4 per fifteen minutes. For one particularly long phone call I’d made on Sunday 23rd November, it would actually have been cheaper to pay for a taxi over to see Kreetch in person.
I’d agreed to sign up for an email to warn me that I was exceeding my monthly bill because I didn’t want to get accidentally smacked with a hundred-pound-plus phone bill. It would have been better/cheaper for me (and less profitable for O2) if they’d warned me I was exceeding my usual phone bill after I’d made that long call on Sunday – and better yet if I’d got the warning email as soon as I went over my free minutes. (The long call would, by itself, have doubled my usual bill: but apparently O2 didn’t trigger the promised email until I’d quadrupled my usual bill.)