When we were advised by BT that having VOIP was the only way we could keep our telephone number when we moved, we weren't told that all local calls made with VOIP have to be dialled including the area code, nor were we told that the Call Minder service with VOIP doesn't give any indication that you have a message waiting, unlike the normal Call Minder which alters the dialling tone. If we'd been aware of these shortcomings we wouldn't have agreed to have VOIP.
