Do Not Disturb

How can I prevent anyone not in my contact list from calling me?

Truecaller

Episode 1412

John from Santa Monica, CA

John wants to know how he can limit the number of calls on his mobile device to only his contact list. Leo says that's called White Listing and since we're now being bombarded with spam and robo calls, that would be a very good idea. Google Voice can do it, but he'd need to get a new number. He can forward his number through it and Google Voice will then filter out unwanted calls, though.