Vonage
Once you sign-up they will bill you forever regardless of you cancelling service
Unless you're sure you be a Vonage customer for life, DON'T ever sign up with them because they will continue to bill you forever, regardless of cancellation. And remember, vonage is a pre-pay service, so THERE ARE NO REFUNDS, period. Onc they've charged your account, they'll never refund a dime ...