Three U.K. has revamped its pay-as-you-go (PAYG) pricing by introducing new, lower rates for prepaid customers who don’t sign up to one of its monthly add-ons. As of this week, customers with PAYG credit who are not using an add-on will pay just 3 pence per minute for calls, 2 pence per SMS message and 1 pence per MB of data.