BT has said it will launch a new service later this year to divert nuisance calls within its network before they ring on customers’ phones.
It said it will use huge computing power to root out 25 million unwanted calls a week.
Currently, BT customers can buy special phones that block nuisance calls, or pay to stop calls getting through.
But the new service will identify some of the 5 billion unwanted calls made each year before they arrive.
They will then be diverted automatically to a junk voicemail box.
Customers will be able to add numbers they don’t want to hear from, for free.
GHM Communications supply business telephone systems in Oxfordshire and nationally.