the same is true for SMS/call spam - my phone number is a single digit off from my wife's, she gets 6-10 total spam messages and calls a day, i get one a year. It's because she uses her cellphone number to sign up for fuel rewards and stuff, and they immediately sell it. I use my voip number to sign up for anything, and i have notifications shut off for SMS - and a phone tree for calls. Spam calls never get through a phone tree/IVR.