Google "truecall" then reach for your credit card.
Also gets rid of telemarketers and irritating Indians offering to fix the operating system that you may not actually use.
Especially good with double glazing merchants and those
who ring during dinner, call you by your first name like they are your best mate and then tell you that your non existent neck injury from the car crash you never had is worth x thousand quid.
.
Not only is it immensely satisfying to have a device cut the swine off permanently without actually ringing the phone, your blood pressure will decrease by several points saving money on medical bills, food that you don't choke on and possibly the cost of divorce as you no longer rage about the house for two hours afterwards.
I have spoken.
Oh yes, also works with crewing should you wish.
