The percentage of scam calls in US mobile traffic increased from 3.7 percent last year to 29.2 percent this year, and it's predicted to rise to 44.6 percent in 2019, ...
The most popular method scammers use to try to get people to pick up the phone is called "neighborhood spoofing," where they disguise their numbers with a local prefix so people presume the calls are safe to pick up, First Onion said. Third-party call blocking apps may help protect consumers from known scam numbers, but they can't tell if a scammer hijacks someone's number and uses it for scam calls.
"Scammers relentlessly inundate mobile phones with increasingly convincing and scary calls,"...
We rely on nomorobo, but
"Solving a problem of this magnitude requires a comprehensive, in-network carrier solution that dives deeper than third-party applications ever could by detecting and eliminating unwanted and malicious calls before they reach your phone."
I've been getting calls on my cell phone from numbers in my own exchange that I don't recognize. I let them go to voicemail, figuring that if it's important they'll leave me a message. They never have. Those calls might well be spoofed, using voice-over-IP services that let them pose as virtually any number they like.