The only anti spoofing technique that works for me is restricting calls to people in my contacts. It’s a bit of a pain with transactional things, but (at least

The only anti spoofing technique that works for me is restricting calls to people in my contacts. It’s a bit of a pain with transactional things, but (at least in the US) it seems we’re long past the days where you could just call someone with no warning. I usually get a text or IM first now.