Ian G wrote on Dec 11
th, 2013 at 10:58am:
Even if messages have been left, how will they know that is the case?
If you miss a call because you're on the phone or using a dial-up internet connection, BT Answer 1571 will take a message and ring you shortly after you've hung up or logged off and tell you that you have a message.
Or if you pick up the phone and there's a new message in your mailbox your have a different dial tone a stutter type tone on the line.
BT said when they announced new charges that it will consider any customer who has ever dialed 1571, even if it was several years ago, as having opted into the service and will add £1.75 to their monthly bill,and they could avoid this by responding to the letter they would be sending out to opt out, and BT said they can cancel at any time.