Quote:0800 854 608 allows you to check your call charges since your last bill
True, but usually quoted as "before any discounts or call plans are taken into account." So, in theory if they do charge you, but this number doesn't indicate it, I suppose you could complain. Then again, where this number is usually advertised may have a disclaimer along those quoted when you call, plus something like "this service is intended to be used as guidane of cost, and not should NOT be realied upon, blah blah".
Also, I wonder if BT's Terms and Conditions excluse "data calls" from any free usuage, 0800 or otherwise, like Videotron/C&W/NTL contraversly did???